2975 points: deleted's comment in hentAI: Detecting and removing censors with Deep Learning and Image Segmentation
2772 points: I_DONT_LIE_MUCH's comment in 20GB leak of Intel data: whole Git repositories, dev tools, backdoor mentions in source code
2485 points: api's comment in Stripe Workers Who Relocate Get $20,000 Bonus and a Pay Cut - Stripe Inc. plans to make a one-time payment of $20,000 to employees who opt to move out of San Francisco, New York or Seattle, but also cut their base salary by as much as 10%
2464 points: iloveparagon's comment in Google engineer breaks down the problems he uses when doing technical interviews. Lots of advice on algorithms and programming.
2384 points: why_not_both_bot's comment in During lockdown my wife has been suffering mentally from pressure to stay at her desk 100% of the time otherwise after a few minutes her laptop locks and she is recorded as inactive. I wrote this small app to help her escape her desk by periodically moving the cursor. Hopefully it can help others.
2293 points: ThatInternetGuy's comment in Iranian Maintainer refuses to merge code from Israeli Developer. Cites Iranian regulations.
2268 points: xequae's comment in I'm a software engineer going blind, how should I prepare?
2228 points: turniphat's comment in AWS forked my project and launched it as its own service
2149 points: Rami-Slicer's comment in 20GB leak of Intel data: whole Git repositories, dev tools, backdoor mentions in source code
Reddcoin (RDD) Core Wallet v3.0.1 - January 09, 2020 Version 3.0.1 is the official release version of Reddcoin Core. It is available for download at Reddcoin Core's Github repository here: https://github.com/reddcoin-project/reddcoin/releases/tag/v3.0.1 This release features PoSV v2.supermajority activation and new staking ruleset (and minor misc fixes). v3.0.1 is still not yet MacOS Catalina compatible. We are still working and should have that fix issued very soon. Sincere apologies to our Mac-using ReddHeads. It is particularly important that all users upgrade, as once PoSV v2 is enforced, version 4 blocks will be rejected from the network entirely. Therefore v3.0.1 is a "strongly recommended" update for all users. Note: If you have already installed v3.0.0, this upgrade is not required. If you have not yet upgraded from v2.0.x or earlier, this is a REQUIRED upgrade. Please install the newest version v3.0.1 to avoid losing functionality during supermajority activation of PoSV v2. Reddcoin Core version 3.0.1 is now available from: https://github.com/reddcoin-project/reddcoin/releases Release Notes are available here and replicated below in this announcement: https://github.com/reddcoin-project/reddcoin/blob/mastedoc/release-notes.md This is a new major version release of Reddcoin. Previously, the original and subsequent versions of Reddcoin were taken from a fork of the Litecoin code base. With the release of Reddcoin V2.0.0, the code was based directly from a fork of Bitcoin. This allows for better source control and feature implementation from upstream changes into the future With the release of Reddcoin V3.0.0, the PoSV stake reward has been improved to allow for a target 5% network growth, in process re-incentivizing individual network stakers and providing for integrated dev support. Upgrading to this release is strongly recommended and required for continued operation. Once a supermajority of 90% is reached, old wallets will no longer accept the new v5 blocks. Please report bugs using the issue tracker at github: https://github.com/reddcoin-project/reddcoin/issues How to Upgrade If you are running an older version of Reddcoin, shut it down. Wait until it has completely shut down (which may take a few minutes for older versions). Run the installer (on Windows) or just copy over /Applications/Reddcoin-Qt (on Mac) or reddcoind/reddcoin-qt (on Linux). Start wallet. All done!
Reddcoin v3.0.0 introduced an updated PoSV method to better distribute staking rewards and target a overall 5% network growth. Staking and relay policy enhancements
To implement PoSV v2, Reddcoin Core's block templates are now for version 5 blocks only. When PoSV v2 consensus (Supermajority 9000/10000) is reached, only v5 blocks will be accepted by the network.This equates to approximately 90% of blocks being generated over 1 week period. Status at any time may be viewed in node debug.log Blockchain Download: Blockchain data for both testnet and mainnet along with instructions can be downloaded from github. https://github.com/reddcoin-project/bootstrap_files 3.0.1 changelog *83e212838 - John Nash, 2020-01-09 : really delete these files *3a1458ecd - Oliver Webb, 2020-01-08 : Added missing dependency libminiupnpc-dev for Jessie *d21915431 - Tiago Peralta, 2019-06-21 : Add vout to listtransactions/gettransaction *8d58ea7cf - Oliver Webb, 2020-01-08 : Script for downloading pre compiled binaries for Raspbian Jessie, Stretch or Buster *d4eced1bc - Oliver Webb, 2020-01-08 : Delete reddcoin_core_download_raspbian_stretch.sh *c5e9f91cf - Oliver Webb, 2020-01-08 : Delete reddcoin_core_download_raspbian_jessie.sh *5d5771b00 - Oliver Webb, 2020-01-08 : Delete reddcoin_core_download_raspbian_buster.sh *75c6ae91b - Oliver Webb, 2020-01-05 : add reddcoin-qt and remove starting daemon process *54c501787 - Oliver Webb, 2020-01-05 : add reddcoin-qt and remove starting daemon process *acb30a2b6 - Oliver Webb, 2020-01-05 : script files for Raspbian Jessie (also Stakebox) *cfddbe594 - John Nash, 2020-01-05 : Update copyright year and version *e46e5e7de - John Nash, 2020-01-05 : download script for pre compiled wallet *37386790a - John Nash, 2020-01-05 : change libssl deb packages links to github *9dbc772e6 - Oliver Webb, 2020-01-03 : download script for pre compiled wallet *857d697fd - Oliver Webb, 2020-01-03 : change libssl deb packages links to github *2cb74b9a8 - John Nash, 2019-12-31 : update copyright year *c641a1ab3 - Oliver Webb, 2019-12-30 : Raspberry Pi build script files for v3 wallet *a3f21a4a4 - John Nash, 2019-12-30 : add install script for building db4 update instructions for unix, osx, arm building using the db4 install script *5f6299b2a - John Nash, 2019-12-28 : docs: Update build notes for arm processors *465716c01 - John Nash, 2019-12-28 : test for arm devices *3fec3a535 - John Nash, 2018-02-02 : build: update source paths *5f6031ab4 - John Nash, 2019-12-28 : Scrypt n=1024 Pow hash based upon Colin Percival's Tarnsnap (2009) Modified by Artforz, coblee, pooler, wtogami, Nikolay Belikov, reddink *2fd4d91a0 - John Nash, 2019-12-24 : update copyright year *326828b36 - John Nash, 2019-12-24 : set release state true *8ebede0a6 - John Nash, 2019-12-24 : release notes *36df6fdfb - John Nash, 2019-12-23 : add check explictly for v5 blocks or greater *874dc1f0c - John Nash, 2019-12-17 : remove hardcoded global variable rearrange debug log output *763b25db8 - John Nash, 2019-12-17 : move copyright to new line *536baf635 - John Nash, 2019-12-17 : update version and set release state to false *cde9009f3 - John Nash, 2019-12-17 : update copyright year *ae41b7ed3 - John Nash, 2019-12-17 : set isSuperMajority to 90% for mainnet *e43e1c8ed - John Nash, 2019-12-10 : additional logging to verify isSuperMajority in the debug.log output *e31783cac - John Nash, 2019-12-05 : add/update public key for mainnet *405c6f002 - John Nash, 2019-12-05 : add log output for current inflation rate *9cc43c3f7 - John Nash, 2019-12-02 : determine calculated stake based on posv version *7baa3bf75 - John Nash, 2019-11-25 : check the posv transaction for correct pubkey *9ffa7ca38 - John Nash, 2019-11-21 : check for posv v1 or posv v2 blocks when calculating stake reward *39f7aad68 - John Nash, 2019-11-14 : add logging *0e283e6c3 - John Nash, 2019-11-13 : correct maths *74cbdeffd - John Nash, 2019-11-11 : use new posv v2 functions addidtional logging *35d7413b5 - John Nash, 2019-11-11 : add new proofofstakereward *3d917216c - John Nash, 2019-11-11 : get inflation adjustment *f63d17443 - John Nash, 2019-11-08 : add the developer output split fund output *ca263c9c9 - John Nash, 2019-11-05 : add dev key to chainparams *df6996ab0 - John Nash, 2019-11-05 : add block version checking *14b663479 - John Nash, 2019-11-05 : increase block version Credits Thanks to everyone who contributed to coding, testing and feedback for this release, notably:
I earned about 4000% more btc with my android tablet than with a $250 ASIC mini rig setup using GekkoScience Newpac USB miners!
Requirements: 1.) Android Device with access to Google Play Store. *I haven't tried yet but you may be able to use tis on Android TV devces as well by sideloading. If anyone has success before I try, let me know! -Note, I did this with a Samsung Galaxy Tab S6 so its a newer more powerful device. If your android is older, your profts will most likely be less than what I earned but to give a projected range I also tested on my Raspberry Pi 4 running a custom LineageOS rom that doesn't allow the OS to make full use of the Pi's specs and I still got 500 h/s on that with Cloud boost, so about 60% of what my Tab 6 with MUCH Higher Specs does. **Hey guys. Before I get started i just wanted to be clear about one thing. Yes I have seen those scammy posts sharing "miracle" boosts and fixes. I have a hard time believing stuff online anymore. But this is honestly real. Ill attach photos and explain the whole story and process below. Thanks for taking the time to read and feel free to share any thoughts, concerns, tips, etc* So last week I finally got started with my first mini rig type mining build. I started getting into crypto about a year ago and it has taken me a long time to even grasp half of the projects out there but its been fun thus far! Anyways my rig was 2 GekkoScience Newpac USB miners, a Moonlander USB miner to pair with an FPGA i already had mining, a 10 port 60W 3.0 USB hub and 2 usb fans. The Newpacs actually are hashing at a combined 280 g/s which is actually better than their reported max hash rate when overclocked. Pleasant surpise and they are simple!! I just wanted to get a moonlander because my fpga already mines on Odocrypt for DGB and I just wanted to experience Scrypt mining and help build the DGB project. The Newpacs are mining BTC though. After I got everything up and running i checked my payout daily average after 1 week. I averaged .01 a day TOTAL between all three miners with them all perforing ABOVE SPEC!!! I had done research so i knew I wouldnt earn much. More than anything i just wanted to learn. But still. I was kinda surprised in a negative way. Yesterday I actually earned less than .01 Frustrated I went back to scouring the web for new ideas. About a year ago, when II was starting, I saw an app on my iphone called CryptoBrowser that claimed to mine btc on your phone without actually using phone resources using a method of cloud mining. I tried it for a week and quit because I earned like .03 after a ton of use and seemed scammy. Plus my iphone actually would get very hot when doing this so I quit using it as it seemed like a possible scam with all the cryptonight browser mining hacks and malware out there. Anyways I was on my Galaxy Tab S6 and saw that CryptoBrowser released a "PRO" edition for 3.99 on Google Play. I bought it for Sh*ts and giggles and booted it up. It came with what they called "Cloud Boost" Essentially this is a button you press and it multiplys the estimated hashrate that it gives you device by the number shown on the boost button. (With the purchase of PRO you get one free x10 boost. You can purchase additional boosts to use with other android devices but those are actually pretty pricy. Another x10 boost was like $25 if i remember correctly). I played with it for about an hour to see if it actually worked like it said it would this time. To my surprise, as i was browsing, my device didnt increase in temperature AT ALL!!!!! I checked my tast manager to confirm and it was indeed true, my memory and usage barely went up. it was giving me an estimated range of 80-105 on the hashrate. Once i pushed the x10 boost button, that went to 800-1150 h/s. I switched my screen to not go to sleep, plugged it to the charge and let it run on the browser page, hashing. When you push the boost button, it runs for 3 hours at the boosted speeds. After that it goes back to normal but if you press the button again, it boosts everything again. There is no limit to how many times you use it. After checking what I earned after 24 hours, I HAD MADE .40 in BTC!!!!! I JUST EARNED OVER 4000% MORE THAN MY $280 MINING RIG EARNED ME!!!! I was blown away. Maybe this was a fluke? I did it again next day. Every 3 hours or so I would push the button again but thats all. Sure enough, .35 that day. Also, it realy BTC. I requested a payout and although it took like 12 hours for them to send me an email stating they had just sent it, I actually did recieve the state amount of BTC within 24 hours in my personal wallet. The fees to send are SUPER LOW!. Like .01 Below I will list the steps I took, along with an explanation of thier "Mining" process on Androids. Reminder, this ONLY WORKS ON ANDROIDS. Also DO NOT use cryptobrowser on a physcal laptop or desktop. I ran it on an old laptop for three days last year and it fried it. It does actually use your hardware on those platforms to mine and it is not efficnet at all as I suspect they prob steal over half of your power for themselves using the REAL RandomX protocol via browser mining which is EXTREMELY INEFFICIENT DONT TRY IT!! -----How To Do This Yourself: Cryptotab Browser states the program works on Android devices by estimating what it thinks the hashrate would be for your device specs and siimulates what you would mine in a remote server however you still earn that estimated coin amount. It is not a SHA-256 process or coin that they say is mining, rather it is XMR and they swap that and pay it out to you in BTC Bitcoin. However I know damn well my Tab S6 doesnt hash 80-105 h/s on RandomX because I have done it with a moodified XMRig module i ported to Android. I got 5 h/s a sec if I was getting any hashes at all. But thats besides the point as I still was making money. Now, when you press that cloud boost button it immediately boosts that hash rate it estimates by the number on the cloud boost. As stated above, you can purchase more boosts and gift them or use them on extra android devices that you may have. Again, they are pricey so I'm not doing that plus it would just mean that I have another device that I have to leave on and open. The boosts come in x2, x4, x6, x8 and x10 variants. Again, they have unlimited uses. Here is the link to grab yourself CryptoBrowser Pro from CryptoTab. This IS A REFERRAL LINK! This is where I benefit from doing tis tutorial. Like i said, I want to be transparent as this is not a scam but I'm also not doing this out of the love of my heart. Their referral system works in that people that use the donwload the app using your link are your stage 1 referrals. Anytime they are mining, you earn a 15% bonus. So say they mine $.30 one day. You would get paid out an additional $.045 in your own balance (it does not come out of the referred user balance fyi so no worries). Then lets say that referred miner also gets their own referrals. I would get a 10% bonus on whatever THOSE people mine. This goes on and on for like 8 tiers. Each tier the bonus percntage essential halves. So again, I stand to benefit from this but it also is stupid to not make this visible as its WAY CHEAPER, EASIER AND MORE PROFITABLE TO GET BTC USING THIS METHOD THAN IT IS USING ASICS!! THIS EARNS ALMOST AS MUCH BTC AS AN ANTMINER S7 DOES RUNNING 24/7 ONLY WITHOUT THE HUGE ELLECTRICTY BILL AND COSTS!!!!) Thats it. Again, if you have concerns, let me know or if you have suggestions, other tips, etc... mention those as well!!! https://cryptotabbrowser.com/8557319 Links to Picture Proof http://imgur.com/gallery/P13bEsB
https://preview.redd.it/1lagrcjnc9o31.png?width=1074&format=png&auto=webp&s=3136db9ca685dc17477d307df722e5b73ba80030 Spock Network is a decentralized storage platform. In the early stage, Spock Network mainly stores Proof of Capacity (POC) consensus data to effectively utilize the most suitable decentralization technology to encourage miners providing hard disk space. Recently, Spock has been growing rapidly and getting listed on four famous exchanges including CoinEx. On Sept. 19, CoinEx will launch Accelerator for Spock, allowing users to subscribe SPOK with 0.0075 USD. Besides, in order to help our users to dig more about Spock, we have invited the open source code contributor of Spock, Titian Xie, to throw an AMA among our community. Below is the recap of the AMA and enjoy your reading!
Q1: How will Spock solve the existing problems in blockchain?
A: Spock is a decentralized storage application network. Judged from the current development of blockchain technology, PoC is the only choice for a decentralized incentive mechanism in a distributed network composed of a large amount of hard disk space and bandwidth. On one hand, this solves the problem of excessive power consumption in the current mining industry, and on the other hand, it solves the problem of fair competition among a large number of existing hard-disk mining machines. At the same time, on that basis, Spock also supports Solidity smart contracts, which makes the entire ecosystem more prosperous.
Q2: Could you please say something about the team?
A: The core members of our team are all early users on Bitcointalk forum and developers of Burst. They are very familiar with the technology development trend and the details of the bottom of the blockchain technology. Even I with such a R&D background could only throw myself down at their feet in admiration. Their ideals are also very pure, that is, to make Spock a community coin like Bitcoin and Litecoin.
Q3: Community building has just started. What will you do to build the social media that remain active and continuously focus on Spock?
A: Spock is a decentralized application platform. The community also relies on spontaneous word of mouth. Since Spock was put on the test net and later on the main net, many miners and holders have spontaneously joined in to become owners, and maintained and promoted the community. The upcoming Solidity smart contracts can be carried out by polling among the holders, and members of the community will vote through the smart contract to determine the project function expansion and community governance.
Q4: Spock is a decentralized storage application platform, so what advantages does it have compared with the traditional centralized storage platform?
A: Traditional centralized storage platforms generally adopt cloud storage. Most of the data is stored on a few cloud platforms, which leads to serious centralization problems arising from data accumulation. There are also problems including higher cost, slower transfer rate, and poorer data security. The decentralized storage application platform encrypts and distributes data through a distributed network, meaning that no party, other than the data holder, could get access to the data, thus ensuring security. And one of the key issues is that the open decentralized platform can do better in protecting private data. As with the case of the assets of the digital assets of Huobi, the private key represents the ownership of the assets, and, on the decentralized storage platform, it can represent the disposition and access rights of the data.
Q5: Spock adopts the consensus mechanism of PoC. What advantages and disadvantages does PoC have compared with PoW and PoS?
A: In terms of resource usage, PoC is just between PoW and PoS, unlike PoW which consumes a lot of power, or PoS that almost costs nothing. Besides, since the core mechanism of PoC is similar to storing the “hashrate” of PoW on the hard disk, it also makes it possible for the mining equipment to mine in different projects at the same time, provided that several different projects use the same data structure.
Q6: We noticed that Spock also introduced the PoS mechanism on the basis of PoC. What is the consideration?
A: With the POS mechanism added in SPOCK, when a miner package a block, if its address balance satisfies the condition, he or she get get all the proceeds; otherwise, the proceeds will be reduced, and those that fail to meet the conditions will be destroyed. So in my opinion, developers introduce POS mechanisms to create a more equitable and sustainable ecosystem.
Q7: What will the team do to attract more developers to join the Spock ecosystem?
A: Spock is the first public link that supports the Solidity Smart Contract and has been put on the main net. It allows developers to port the DApp on the Ethernet to the network at a very low cost, while developers can design the mining and pledge mechanisms for the tokens of PoC distributed on this network.
Q8: What is the form of Spock mining? What are the conditions for miner application?
A: In SPOCK, mining is carried out through the storage device. First, you write the result of the hash calculation to the device, and reduce the huge hash calculation required in PoW algorithm by retrieving the data in the hard disk. Only a small amount of hash calculation will be required in execution stage. You can mine as long as you have storage equipment and meet the hashrate conditions. Ordinary miners just need an ordinary computer with a hard disk and access to the internet, then they need to go through hard drive mapping, download the wallet, install nodes and so on before mining.
Q9: I am a Windows phone user. How do I download a SPOK wallet?
A: At present there is only the Android version. Versions of other platforms are subject to the official arrangement.
Q10: Miners don’t know how much hashrate they have or how much they could pledge.
Q13: What are the advantages compared with Lambda or such? The larger the hard disk, the higher the hashrate?
A: My suggestion is to experience the mining process on both official sites so you may understand the differences between them.
Q14: Can we use the Raspberry Pi to mine at home?
A: Yes, theoretically. Yet the weak computing power of Raspberry Pi itself may affect efficiency in hard drive mapping. This is the end of the sharing. See you next time! If you have any suggestions, please submit a Ticket here: https://support.coinex.com/hc/en-us/requests/new
Another Quarter, Another Release! The Groestlcoin production factory has been working overtime as always in order to deliver even more tech to push Groestlcoin mainstream when the time comes. There have been many new fantastic wallets and exchanges added to Groestlcoins repertoire over the past 3 months so we will re-cap these before moving on to what is new today.
Groestlcoin added to SatWallet – A 3-in-1 service. Multicurrency wallet, exchange and soon a debit card!
ChangeHero announced a week of 0% commission for Groestlcoin trades.
Added to BC Bitcoin cryptocurrency exchange, offering 8 fiat pairs!
Added to Chameleon Pay mobile wallet for Android and iOS!
Added to the Okex' strategic partners cryptocurrency exchange; CoinAll! Offering BTC and ETH pairs! With a 21,5000 GRS Giveaway!
Added to Spark Card! Our second MasterCard for Groestlcoin! Provided by Pungoio, powered by TarjetaSpark and issued by Mastercard!
Added to Swirlpay! A decentralised peer-to-peer payment gateway.
Added to Archos Safe-T Mini hardware wallet! Built around encrypted Chipset memory.
Added to Agama Wallet – A multi-asset encrypted wallet for iOS, Android, Windows, Mac OS and Linux from Komodo.
Added to Mr Coin exchange, with 2 fiat pairs (EUR and HUF)
Added to CryptoFacil Exchange – An exchange powered by Bittrex and is a fiat gateway. Leaving you with the ability to buy GRS with Visa and Mastercard.
Added to Bits Game – A gambling service with 2 'PvP' games
Added to Boost X Change Cryptocurrency exchange!
Added to Sucon's Suworld Korean cryptocurrency exchange!
Added to DCXinsta cryptocurrency exchange and swap service with Fiat pairings.
Added to DCXtrade, an Indian cryptocurrency exchange with BTC and ETH pairings.
Added a fiat KRW pairing on Huobi Korea Cryptocurrency Exchange!
Added to AirGap wallet, allowing you to securely store your GRS on an offline device.
Added as a payment method on hodlhodl, allowing you to make global trades without KYC/AML.
Added to TrustWallet cryptocurrency wallet for iOS and Android
The existing Magnum wallet adds SegWit support for the wallet! Allowing SegWit addresses to be used and created from within the wallet.
Added to CycleBit – Who provide POS Terminals that accept GRS payments anywhere, in-store and online. 130 coffee houses in Spain already accept GRS using Cyclebit POS terminals!
Added to Bitinka Cryptocurrency exchange! The #1 exchange in Latin America with 5 fiat and cryptocurrency pairs!
Added to Atomic wallet, a non-custodial cryptocurrency wallet with encrypted private keys and 40,000 monthly users.
Added to NoMiddleMan cryptocurrency payment gateway, offering no usernames, no registration, no KYC, no fees. Completely free to use!
Added to Blockchair! An advanced data analysis tool, mempool monitor and block explorer!
Added to SecuX V20, SecuX W20 and SecuX W10 hardware wallets!
Re-forged: Groestlcoin Samourai
Groestlcoin Samourai is a wallet for the streets. A modern Groestlcoin wallet hand-forged to keep your transactions private, your identity masked, and your funds secure. Its main advantages are its extreme portability and is the most secure Groestlcoin mobile HD wallet. We've built a wallet that Groestlcoin deserves. If you are looking for a wallet that Silicon Valley will never build, the regulators will never allow, and the VC's will never invest in, this is the perfect wallet for you. ![Groestlcoin Samourai Release Video](http://img.youtube.com/vi/i3WU8Tde8XQ/0.jpg)
Head over to the Groestlcoin Samourai Release Page here for the full release announcement.
Groestlimage turns any file into a mnemonic phrase allowing users to generate Groestlcoin private keys and addresses based on the data URI of the provided file. A picture is worth a thousand Groestls.
Turn any image, document or audio file into a BIP39 mnemonic phrase
Groestlcoin Core Config Generator is a simple GUI to configure the groestlcoin.conf file – A developers dream tool! Each configuration option is available via the user interface, grouped by what attributes they affect. For ease of getting started with a new configuration, a variety of preset "node classes" are available on the right-hand-side of the screen. Selecting a preset will load our recommended base configuration for a node fitting that description, at which point you can then tune the configuration at the single option level.
Choose between Mining, Non-Standard Ports, Low Bandwidth, Pruned, Raspberry Pi, Tor, Testnet, Regtest, Non-Syncing and Lightning Éclair presets.
Groestlcoin Simple Push TX is a server to push Groestlcoin transactions via SMS. Now everybody can send new transactions via SMS if the Internet is not usable (i.e. blocked by government entities or becomes otherwise unavailable).
Ability to push either Base64 or Hex-Encoded Raw Transactions via SMS.
Send SMS transactions to PushTX through the number +32460224477 (+32460224GRS)
Electrum-GRS is Groestlcoins #1 thin-client for Windows, MacOS, Linux and Android, based on a client-server protocol. Supporting multi-sig wallets without the bloat of downloading the entire blockchain.
New Features (Universal)
Electrum Protocol: The client's "User Agent" has been changed from "3.3.6" to "electrum/3.3.6". Other libraries connecting to servers can consider not "spoofing" to be Electrum
Added CoinGecko.com fiat rate provider. Changed default provider to CoinGecko.com
Minor bugfixes and usability improvements.
New Features (Windows, MacOS, Linux)
Fix Crash during 2FA wallet creation
Fix Synchroniser so that it does not keep resubscribing to addresses of already closed wallets.
Fix removing addresses/keys from imported wallets
The logging system has been overhauled. Logs can now also optionally be written to disk, disabled by default.
Fix a bug in the synchroniser where client could get stuck. Also show the progress of history sync in the GUI.
Fix Revealer in Windows and MacOS binaries
Ledger Nano X is now recognised, supporting mainnet and testnet
KeepKey is now recognised and supports mainnet and testnet
Device was not getting detected using Windows binary
Support Firmware 6.0.0+
Implement "Seedless" mode
Coin Control in QT – Implemented freezing individual UTXOs in addition to freezing addresses
Fix CPFP – The fees already paid by the parent were not included in the calculation, so it was always overestimated.
Testnet – There is now a warning when the client is started in testnet mode as there were several reports of users getting scammed through social engineering.
CoinChooser – Performance of creating transactions has been improved significantly for larger wallets.
Importing/Sweeping WIF keys: Stricter checks
Several other minor bugfixes and usability improvements.
New Features (Android)
Fix rare crash when changing exchange rate settings
Fix bug with local transactions
Allow selecting Fiat Rate providers without historical data
Como ser anónimo na Internet – [TUTORIAL COMPLETO]
Antes de mais, não sou um especialista, apenas alguém interessado em segurança e comunicação e este tutorial é apenas direccionado à educação :D
1) HTTPS ou TOR?
Ao navegarmos a Internet convencional ou a “surface web” usamos protocolos. Tudo começou com o HTTP (HyperText Transfer Protocol), foi um dos primeiros protocolos quando tentamos aceder a um site mas é bastante fácil para um “hacker” ver o que fazemos e por onde navegamos isto porque não há qualquer tipo de encriptação entre o servidor web e a vossa máquina ou seja, basta alguém estar estar na mesma rede do que vocês, por exemplo a mesma rede wifi, e executar um MITM (man in the midle atack). Onde o hacker redireciona o tráfego da máquina alvo para o seu servidor e ele literalmente lê os pacotes de dados (informação trocada ou seja, passwords, utilizadores, etc) com um simples “sniff” no wireshark (programa que nos permite ver pacotes de dados (TPC, UDP, etc)). Forma bastante eficaz de roubar informações a alguém em servidores desprotegidos. Felizmente e a nosso favor a maioria dos sites hoje em dia usa HTTPS (HTTP + SSL), muitas pessoas convencionam o “S” no final do HTTPS como “secure”, daí o cadeado verde que vemos quando acedemos a esses websites. O processo (SSL) começa quando nos tentamos conectar a um site e ele manda-nos uma cópia do seu certificado SSL (Chave pública), o navegador verifica se o certificado está expirado, em vigor, valido, etc (uma grande treta de acreditação). Se o navegador confiar no certificado, ele cria e envia de volta uma chave de sessão simétrica utilizando a chave pública do servidor. O servidor da decrypt da chave de sessão simétrica usando a sua chave privada e envia de volta uma confirmação criptografada com a chave de sessão para iniciar a sessão segura e agora o servidor e o navegador comunicam com, supostamente, segurança. São assim realizados os primeiros momentos de conexão quando acedemos a um website com HTTPS. P.S: Pensem em chaves publica como algo que transforma x em alguma coisa que só pode ser aberto com a chave privada, y. Mais sobre isso a frente.
1.2) Se HTTPS é assim tão seguro, porque usar tor?
Bom, mesmo com esse tipo de segurança há várias formas de ver ou atacar alguém. Sempre podemos fazer phishing, ainda usar MITM (fazermo-nos passar por o servidor verdadeiro, é difícil AF mas possível) entre muitas outras coisas.. Com o Tor deixamos de ter esses problemas. Mais ou menos.
1.3) Mas o que é Tor?
Tor é uma comunidade, uma rede de computadores muitas vezes referida como Dark Web ou Deep Web. A rede Tor dá-nos um nível de segurança com 128-bit AES (Advanced Encryption Standard) end-to-end (De computadores para computadores, não da nossa máquina até ao website). No final das contas é uma rede que sobrepõe “IP’S” em várias camadas e deve ser tratada como tal. O melhor é usar HTTPS e Onions (Tor), HTTPS protege os nossos dados a nível de navegadores (nós)<=>(WEBSITE) e a rede Onion reforça o anonimato com “loops” pela internet de modo a escondemos a nossa identidade (IP). Mas esse nível de segurança depende do próprio website/servidor com que estamos a tentar comunicar. Para os nerds que desconheciam esta tecnologia, aqui têm um “Let’s Encrypt” para onions (here) A rede tor funciona a partir de nodes, qualquer um pode fazer um relay, node de saida, etc. Uma autentica rede de computadores que comunicam entre si anonimamente.
1.3.1) Um aparte do funcionamento dos nodes…
A comunicação do vosso computador para a internet depende do node de entrada onde basicamente o vosso computador entra na rede tor. Esse node de entrada comunica convosco e sabe o vosso endereço IP.
Esse node de entrada em seguida passa a vossa ligação para um relay. O relay comunica com o node de entrada e outro relay (pode haver vários) ou um node de saída mas não conhece o vosso IP
E finalmente a vossa ligação chega ao node de saída onde o vosso pedido inicial é desincriptado e mandado pela Internet. O node de saída não conhece o vosso IP, apenas o IP do relay anterior.
Utilizando este modelo de 3 ou mais nodes fica mais difícil, mas não impossível de correlacionar o vosso pedido inicial com o vosso IP original. Também queria frisar que a maior parte destes nodes são universidades (fun fact) O problema vem quando escrevemos “plain text” num site que acessamos via Tor, imaginemos que o meu exit node é o FBI ou a NSA. Se tivermos introduzido dados sensíveis apenas rezem que quem estiver a manteoperacional o exit node não tenha poder computacional suficiente para desencriptar a vossa ligação.
1.4) Let’s get REAL
Depois disto não parece nada seguro usar tor né? O bom é que é praticamente e impossível quebrar 128-bit AES. Toda a rede de bitcoin (hash rate atual é de 60M) demoraria 2.158 x 10^12 anos para quebrar 1 só chave. E para além do mais, sempre podemos configurar os nossos nodes, mais aqui. Apenas não coloquem nada que não gostariam que se tornasse publico pois a segurança nunca é garantida! O que é (praticamente) garantido é o anonimato com o tor :)(Eu diria até que o vosso anonimato é garantido, todos os websites na deepweb que foram fechados até o dia de hoje por exemplo, não teve nada a ver com uma falha na rede tor mas sim foi um descuido dos administradores) E para comunicação na web (chat) usem sempre PGP (Pretty Good Privacy), vamos falar mais a frente.
2) Que sistema operativo usar / Como Operar
Pretty bit topic here..
2.1) Sistemas Operativos
Querem anonimato? Usem um sistema operativo ao vivo (Live Operating System / Live CD). É um sistema operativo contido num dispositivo de armazenamento móvel, podem usar em qualquer lado com um computador (motherboard não desbloqueada) não deixando qualquer rasto no pc da sua existência (kinda, mais a frente).Caso não queiram ser tão hardcores sempre podem usar linux muito bom também, updates constantes da comunidade ;)Para o típico utilizador windows.. sabiam que o windows envia tudo o que vocês escrevem e falam para a Microsoft? Aqui têm tools que removem a telemetria and stuff (here) Se são uns completos noobs e nunca instalaram nenhum OS (operating system) podem usar uma coisa chamada Virtual Box que emula um sistema operativo dentro de outro. Pesquisem.
P.S: No que toca à Apple não tenho experiência portanto, não comento.P.S2: Dêm uma vista de olhos no “qubes”, sistema operativo hardcore para segurança.
2.2) PGP, Como Operar & Related
2.2.1) Mini Introdução
Temos de assumir sempre o pior, qualquer agência de inteligência ou governamental interceptou e desencriptou os nossos dados. O que eles podem usar contra nós? Temos sempre de agiter o cuidado de nunca compartilhar dados pessoais, NUNCA. Ter uma boa password sem nada que nos identifique (Tenho uma boa password?) e diferentes passwords e entidades para cada serviço/website que usemos. Lembrem-se, basta “deslizar-mos” uma vez e somos comprometidos. Caso usem o mesmo utilizadopass qualquer organização/pessoa com intenções pode “ligar os pontos” e identificar-te.
2.2.1) PGP (Pretty Good Privacy)
Outro passo que devem tomar é comunicar apenas usando PGP. Lembram-se das chaves publico e privadas? Vou salientar novamente esse tópico.Tomem em conta que nem sempre é possível comunicar com PGP, quando estamos a preencher informação num website ou wtv essa informação pode estar comprometida. Side Note: Há uns open sorce code para usar o Proton Mail com PGP com alguma facilidade, pesquisem nerds.
O processo PGP:
Criam uma chave privada e uma chave pública
A chave pública é aquela que vocês mandam para as pessoas poderem encriptar mensagens/ficheiros/etc.
A vossa chave privada é guardada por vocês, é a única coisa que pode desencriptar os ficheiros encriptados pela chave pública.
A pessoa com quem comunicarem tem de fazer exactamente o mesmo processo e vocês tem de usar a chave publica delas para lhes enviar mensagens.
GUARDEM BEM A VOSSA CHAVE PRIVADA, GUARDEM NUM LOCAL OFF-GRID, fisicamente escondida. Caso comprometida, fudeu. E já agora, se a perderem não há nenhuma forma de a recuperar. No tails a área onde podem mexer com o PGP fica no canto superior direito, uma que parece uma prancheta, vão a “manage keys”. Por exemplo, uma das razões que o Silk Road falhou foi que Ross (um dos administradores) nem sempre comunicava através de encriptação PGP e depois de ser apanhado (meteu informações pessoais na net no inicio da sua jornada) as autoridades tiveram acesso a tudo o que não estava encriptado. Sugiro sempre que guardem as suas chaves privadas num cartão SD ou melhor num microSD para que se um dia forem apanhados e alguém for-vos bater à porta podem simplesmente parti lo e os vossos dados ficam seguros x)
2.2.2) Tails e resíduos
(assumindo que têm o tails a funfar..) Tails é um excelente sistema operativo para privacidade, quando ligado e “bootado” no PC ele cria um drive virtual e quando é fechado tal é apagado, mas não permanentemente. Como deve ser conhecimento geral, armazenamento na memória de um computador (no seu disco rígido) funciona a base de 0’s e 1’s. Vamos supor que crio uma pasta chamada “teste”. O disco rígido será desempenhado de designar os respetivos 0’s e 1’s a uma secção do disco e saber onde está tal secção. Temos 2 dados importantes aqui, os dados da pasta “teste” (0’s e 1’s) e a sua localização na respectiva secção do disco, chamam-se “pointers”. Pointers apontam o local do disco onde estão armazenados os dados (0’s e 1’s).Quando apagamos algo (tradicionalmente) apenas apagamos os pointers e os 0’s e 1’s anteriormente designados à pasta teste estarão agora labled como livres, esperando serem rescritos por novos 0’s e 1’s de novos dados. Espero ter sido claro. Portanto, alguém com habilidades pode pesquisar no disco 0 e 1’s designados como “espaço livre” que, organizados “façam sentido” e recuperar os nossos dados privados. Temos 2 opções:
Dar Shread nos ficheiros (Rescrever aleatoriamente 0’s e 1’s “livres”)
Encriptar o disco rígido
2.2.3) Encriptação do disco inteiro & destruição segura de ficheiros & RAM
No que toca a encriptação do disco tails tem uma funcionalidade incorporada chamada FDE (Full Disk Encryption) ou seja, formata-vos a pen (ou o quer que seja que estão a usar) e rescreve-a com o seu conteúdo encriptado sendo apenas possível ganhar-lhe acesso com uma palavra-passe. E como sempre, guardem a password num local seguro ou memorizem-na. Tutorial de como encriptar o disco (here) E no que toca a destruição segura dos ficheiros há vários programas para o fazer, apenas recomendo que o faças no mínimo 3x (para garantir aleatoriedade). Duck it. Mesmo com o disco encriptado e os dados limpados ainda podemos extrair-te informações pela tua RAM📷 Chamam-se de “Cold Boot” esses tipos de ataques.
Primeiro, RAM (random acess memory), quesamerda?
RAM é o local onde o computador armazena dados que apenas são necessários temporariamente e isso acontece milhões de vezes por segundo. Pensem na RAM como uma memoria onde pode ser escrita e rescrita os 0’s e 1’s extremamente rapido. Imaginemos que estão a trabalhar num documento de texto, enquanto trabalham tal está a ser guardado na RAM (armazenamento de curto prazo) até que clicam em salvar e o documento é armazenado no disco rígido em si (armazenamento de longo prazo). Nesse período de tempo os dados são armazenados na RAM sem qualquer tipo de encriptação. Quando desligamos o computador normalmente ele passa por um ciclo onde limpa os dados armazenados na RAM mas se ele perder energia abruptamente os dados ficam “leaked” na RAM e é onde são realizados os Cold Boot Atacks. A única medida que podemos implementar contra este tipos de ataques é usar RAM DDR3 (isto porque ela necessita de eletricidade para manter dados, passado x tempo os dados são apagado) e desligar o PC normalmente, sempre.
Abram uma nova tab (janela) no navegador e escrevam “about:config” e cliquem no botão “I’ll be careful, I promise.” (apenas versões mais antigas, se não tiverem botão, ignorem)
(se usam tails, cada vez que o iniciam poderão de ter de fazer isto)
2.2.4) Dados EXIF
Tiramos tantas fotografias com os nossos telemóveis né? Sabiam que provavelmente a vossa localização está incorporada nelas? Quase todos os formatos de fotos podem ter as cordeadas incorporadas menos o formato .PNG portanto é imperativo para um criador de um website apenas permitir formatos PNG e também para nos porque a nossa informação pode dar “leak” por um erro tão simples como este. Felizmente o Tails tem uma solução, basta irmos a Applications -> Accessories -> Metadata Anonymisation Toolkit, mais info –> (here)
2.2.5) VPN + TOR = PERFECTION?
Bem, não. VPN’s não são de confiança. A famosa “HideMyAss” que supostamente tinha uma carrada de implementações de segurança que nem eles próprios conseguiriam ver o que o utilizador fazia abriu a boca quando questionada pelo governo da Inglaterra sobre o caso LulzSec.Mas se tentarem a vossa sorte escolham uma que no mínimo tenha 128 bits ou até mesmo 256 bits de encriptação. Se querem ainda mais segurança do que já têm, comprem umas raspberryPi, disfarçam-nas e coloquem-nas em um sitio que tenha uma rede Wifi Publica escondidas e com eletricidade, façam uns servidores OpenVPN, uns proxies da treta e GG (Como criar uma rede tor mas caseira). Fiz um tutorial de como fazer uma VPN numa raspberry, depois é só fazer uns loops. P.S: DNSQueries, não confiem na vossa rede.
2.2.6) Cuidado com downloads
Por vezes numa comunidade da deepweb recebemos PM (private messages) que nos dizem que a nova atualização do tor tem uma falha de segurança e aqui está o link X para dar patch. Treta, nunca confiem e façam sempre o download do website oficial (cuidado com o phishing) mas podemos sempre verificar a autenticidade dos nossos downloads. Recomendo o uso do GnuPG. Pesquisem, muito importante! Voltamos a usar o nosso amigo PGP ;) P.S: Não só downloads, também podem assinar mensagens encriptadas (quase como encriptado 2x)
2.2.7) Simples e eficaz, adeus monitorização da treta
Podem-nos identificar de várias maneiras, uma delas é pelos nossos padrões habituais que podem ser usados contra nós em tribunal. Uma forma fácil de acabar com isso é desabilitar “mostrar o meu status online”, muito comum em fóruns e comunidades.
2.2.8) Usem bridges!
Mesmo com esta segurança quando ligados ao tor o vosso ISP (Internet Service Provider) pode ver que vocês estão a usar o Tor, para tal sempre podemos usar bridges. Lista de bridges (here) captcha é hard mesmo.. (ataques de correlação) Depois de entrarem vão ter acesso a uma lista de bridges que são publicamente disponiveis pelo Tor, talvez não seja a melhor opção mas sempre tens a opção de mandar diretamente um email para [[email protected]](mailto:[email protected]) com o body da mensagem sendo “get bridges”, infelizmente só funciona para Gmail e Yahoo (anti bots) Para usa-las no boot do tails aparecem 2 opções: Live e Live (Fail Safe), neste menu cliquem em Tab , Espaço e escrevam “bridge” e depois enter. Modo bridge ativado. Ao entrarem no tails basta adicionar as vossas bridges numa tab que vos vai aparecer neste formato-> IP:PORTA e gg. Visto que é muito menos provável que o vosso ISP conheça estas ligações. Também podem especificar o pais assim: XXX.XXX.XXX.XXX – COUNTRY: X De qualquer das formas bridges é um assunto complexo, do your homework. Coisas bonitas para vocês (here)
3) Governo e polícia
3.1) Os seus limites
Bom, não têm, pelo menos os americanos (casos mais conhecidos). Eles chegaram ao ponto de ter uma conta no silk road como vendedores onde seriam vendidas fake ID’S (durante 7 anos), após esse período começaram de apreensões. E no serviço postal dos US, qualquer encomenda “ilegal” não eram apreendida mas sim colocavam-lhe um tracker. Tenham sempre em mente que se eles vos querem apanhar mesmo, eles farã tudo no seu alcance para vos capturar. Tenham sempre em mente que se vocês estão a fazer qualquer tipo de actividade considerada ilegal têm sempre de ter em conta o pior cenário possível. Vocês até podem ter uns PC’s, uns servidores e algumas skills mas não é nada comparado com o poder deles. Lembrem-se, basta escorregarem uma vez e acabou, sejam prudentes.
3.2) O que fazer quando se é apanhado
Errar é humano. Provavelmente vamos todos cometer um erro e se o governo achar que somos um peixe suficientemente grande ele vem a trás de nós. É sempre melhor prevenir do que remediar, temos de ter já um advogado pago 50k + extra (caso sejam ilegais, mesmo.) isto porque o governo pode congelar-nos as contas/apreender o dinheiro. Sabiam que o silencio é um direito? Mantenham a boca fechada. Eles vão tentar usar todas as táticas para nos fazer admitir que somos culpados dos crimes de que somos acusados. Provavelmente a primeira coisa que eles vos vão dizer é que nos querem ajudar e estão a trás do maior peixe do cardume, ignorem, treta. Eles vão dizer “então não queres cooperar? Estava a tentar ajudar-te mas agora só vais dar problemas” ou “Tens alguma noção dos crimes de que és acusado?”. Mais uma vez, mantenham-se calados e continem a pedir por um advogado. Nunca falem sem o vosso advogado presente e nunca façam nada que não seja exigido legalmente. Vocês têm o DIREITO de estar calados. Não discutam com os policias sobre se eles têm ou não alguma coisa contra ti, sê chill nesse assunto. Age assustado, ansioso e confuso. Como se não soubesses o que se passa e apenas queres o teu advogado. Diz aos policias: “Vocês estão-me a assustar, apenas quero o meu advogado”… como eu amo engenharia social. Com o vosso advogado é o basico, sejam honestos com ele e trabalhem como uma equipa. Privilegio Cliente-advogado.
4) Cool Stuff
TorChat funciona da mesma forma que o tor funciona com todas a features que todos gostamos, cria links .onion da mesma forma que o tor mas usa-o para identificar um ID de uma pessoa em particular sendo que esse ID pode comunicar com outros ID.
P.S: Não recomendo, ideia bonita mas não sabemos o nível de anonimato ou as vulnerabilidades que tal implica visto que funciona da mesma forma do que se como tivéssemos criado um HiddenService (um site tor) no nosso PC. Isso pode levar a problemas sérios. Fica à vossa mercê, de qualquer das formas a sua comunicação eu<=>parceiro teria o mesmo nível de segurança do que o tor.
Hash Rate in the News With the announcement that Bitmain will offer ASIC miners for Ethereum, climbing hash rates are in the news. Briefly, hash rate is the number of hash calculations made per second across an entire cryptocurrency network. For Proof of Work (PoW) networks (we will get to Proof of Stake below) hash rate scales linearly with carbon footprint and Proof of Environmental Damage. Let’s look at some current PoW hash rates: Bitcoin 25.5 EH/s (quintillion), or 25,500,000,000,000,000,000 hashes per second. Ethereum 256 TH/s (trillion), or 256,000,000,000,000 hashes per second. Now let’s look at environmentally-friendly Qtum Proof of Stake (PoS) mining. For Qtum PoS mining, each full node securing the network does one SHA256 hash calculation every 16 seconds. We can easily calculate the network hash rate for Qtum as approximately 6,900 nodes / 16 seconds = 431 hashes per second! This uber-low hash rate also explains why Qtum can be successfully mined with minimal computer resources, such as on a Raspberry Pi. Save the hashes, save the environment, Jackson blog post on Medium
News You Should Know:
Inside the Brotherhood of the Ad Blockers Pi-hole (as in “shut your …”) is a free, open source software package designed to run on a Raspberry Pi, a basic computer that’s popular with DIYers, fits in the palm of your hand, and retails for about $35. Most ad blockers have to be installed on individual devices and work only in web browsers, but Pi-hole blocks ads across an entire network, including in most apps. [This article mentions Pi-hole, which is a great concept. Briefly mentions Brave, so put it in the news you should know section.] https://www.bloomberg.com/news/features/2018-05-10/inside-the-brotherhood-of-pi-hole-ad-blockers Apple is reportedly removing apps that share your location data with third parties Apple has started removing apps from the App Store that violate the company’s policies by sharing location data with third parties without explicit consent, reports 9to5Mac. The breaches are related to sections 5.1.1 and 5.1.2 of the company’s App Store Guidelines, which say that apps must not transmit “user location data to third parties without explicit consent from the user [or] for unapproved purposes.” https://www.theverge.com/2018/5/9/17334602/apple-targeting-apps-location-data-sharing-third-parties Google goes for the wow at I/O, but what about privacy? While there were some jaw-dropping announcements, what we didn't get was a whole lot of insight into how the world's biggest search company is thinking about its approach to privacy and data collection. ZDNet, CNET's sister site, points out that there was no mention of privacy, and only one mention of security during the entire two-hour keynote on Tuesday. https://www.cnet.com/news/google-goes-for-the-wow-at-io-2018-but-what-about-privacy-ai-virtual-assistant/ Medium abruptly cancels the membership programs of its 21 remaining subscription publisher partners Medium has informed publishers using its platform to offer paid memberships that it’s ending that feature. An email at the end of last month from Medium’s head of partnerships Basil Enan told publishers that the company was planning to discontinue memberships in May. http://www.niemanlab.org/2018/05/medium-abruptly-cancels-the-membership-programs-of-its-21-remaining-publisher-partners/ Jason Kint posts about Facebook and Google are eating all US advertising Jason Kint@jason_kint woah, new read on IAB report today, Duopoly actually eating all US advertising. TOTAL Internet + TV + B2B + Magazines + Newspapers + Radio + OOH + Music + Video Games + Cinema = grew $13.3B in 2017 Google and Facebook = grew $13.4B in 2017 "Everything Else" = shrank $.1 https://twitter.com/jason_kint/status/994766261304414208 _____________________________________________________
Making pooled mining immune to 51% attacks, selfish mining, etc. by bundling an SPV client into mining software.
This idea has been floating in my mind for a while, but I haven't seen anyone else mention it. Figured it was worth discussing.
The threat posed by pools is that they indirectly control large amounts of hashing power. Miners are mining blindly on whatever header the pool gives them, and hence can be made to attack the network at their leisure.
GetBlockTemplate was supposed to fix this problem by allowing miners to do their own transactions (and making what they're mining completely transparent). This works, but adoption is low for a few reasons:
GBT is bandwidth-hungry compared to Stratum.
GBT, to be effective. requires a miner to run a fully validating node. Most miners run very small computers as hosts for their hardware (think Raspberry PI).
Supporting GBT requires both the pool and the miner to use it (and GHash.io doesn't support it, according to the wiki).
TLDR: GBT is a great way to neuter the ability of pools to do bad things™, but it isn't widely deployed due to the resource requirements and setup effort of using it properly. Most/All the big threats posed by a large pool boil down to:
Building on a block not on top of the longest chain (51% attack/history rewriting).
Keeping the longest chain private and continuing to work on it alone (Selfish mining).
In both cases, the fact that this is occuring is actually detectable regardless of mining protocol (getwork,stratum,GBT), because the parent block hash is part of the header the miner is hashing. So the information you need to know whether you're being used to attack the network has been available all along.
By bundling an SPV client into mining software, all miners can verify that they're building on top of a block that is:
Known to the network (blocking selfish mining).
The tip of the longest chain (blocking orphaning of other blocks/51% attacks).
If this isn't the case, they can switch to their backup pool.
Advantages of the approach:
SPV is very low on resource usage, so the cost of using it is negligible. It could just be bundled into all mining software by default.
We can stop relying on "a pool would lose all its miners if it tried" and rely instead on "a pool can't get its miners to help".
Game theory wise, running such a failsafe costs nothing/nearly nothing, and it only makes you switch away from a pool when it is attacking the network, as opposed to having to switch when the pool gets too big (even if it's benign).
A pool can't tell the difference between a miner that runs this check and one that doesn't, so it can't encourage miners not to run it.
It incentivizes pools, even large ones, to get their blocks broadcast as fast as possible (so that their miners will start working on it).
Certain types of attacks against 0-conf transactions (Finney attack, Race attack) will still be possible. However, those are a risk even with 20% pools (success is at most linearly proportional to hash rate).
The best tested SPV client is built in Java (bitcoinj), so it can't be bundled into mining software easily. We'd have to find a solid implementation in C/C++ (looks like picocoin might work), or write one.
The system would have to be extremely reliable before miners are willing to use it (it shouldn't have false positives at a rate much higher than the likelyhood of attack). We could start by having it send a warning to the operator instead, and see how frequently mistakes happen.
To deal with propagation delays, the mining software would probably be willing to mine for ~30-60 seconds before triggering the failover. If blocks get so large that propagation times are close to the block interval, this will break (it will be far from the only problem they'll have).
Because SPV clients don't relay blocks, it might be possible for an evil pool to run a bunch of nodes (so that their miners connect to those), and block any IP that's not from their miners, in order to continue being able to do selfish mining. This could be addressed by verifying that multiple nodes know about the block or by getting the block from a node that knows it and relaying it to all others.
This only works against pooled mining attacks, where the hashing power belongs to people who don't want to attack the network.
If the longest chain is invalid, somehow, then miners will refuse not to build on it. This could be really bad.
Does this work, or am I missing something obvious?
To arms Bitcoin community! Help us to complete this mining installation for the Zürich MoneyMuseum. We are not asking for funds. Only your expertise needed! 20$ tip if you give us the relevant clue to solve or mitigate our main problem. Nice pictures of the exhibition inside as well…
Edit: A big thank you to all people who helped us we can now mine true pps with diff1! The people in this thread which have helped most have been awarded. I want to mention also the operator of btcmp.com denis2342 and Luke-Jr. Actually looking at the miner screen in the Linux terminal helped a lot ;-). The pool constantly resigned to stratum with variable difficulty. We can now mine true pps with diff1. Getwork with long polling seems to be default after disabling stratum... We will probably post again, when there is a video of the installation in action... Again many thanks. Learned a lot. Edit: Thank you for all the answeres so far! We will try different things now and report back. Tip bounty will be distrubuted as soon as we found out what finally does the trick. Ths could take a few days. The offerd tip will be distributed and very likeley a few others as well. First of all, let me tell you that the Bitcoin Exhibition at the Zürich MoneyMuseum is most likely the biggest and most diverse of it’s kind. Please read more about the museum and the exhibition below. Help us solve the following problem we experience with our “Muscle Powered Proof of Work” installation: Me and a friend have invested a lot of time to build an installation for the Museum. It is basically a 10GHash/s miner and RapberryPi which is powered by a hand generator (Maxon DC motor with planetary gear). Here are some pictures of the installation, although not entirely put together yet. There are still some changes planned. https://www.dropbox.com/sh/0qcvl3wu4romhnt/AAAYF08lnVAy6W6KEepE7e2Ua?dl=0 Now let’s get to the core of our problem: We are mining at the getwork diff1 pool btcmp.com as it is a true pps pool with getwork diff1. The visitors in the museum can power the generator for 2-3min and see directly how many Satoshis the "network" (actually pool but we don't want to confuse the visitors to much at that point) has given the museum for their work. This all works well so far but one problem remains. Sometimes the pool does not get a share from us for more than 40 seconds or even more than 60 in some cases. I have calculated that with 8.4 GHash/s we should find a share about every 0.5 seconds in average (diff1). I think when the pool gets a share it gets all the hashes as it then accounts for several Satoshis. Statistically we get per minute what we should get in theory. We would very much like to lower the time between the accepted shares by the pool, however. This would help to make the overall experience much smoother for the visitors. Please look at this screenshot from MinePeon and answer some questions: https://www.dropbox.com/s/lb1jei4trc9kqe5/MinePeonScreenshot.png?dl=0 We see that we get a lot of diff1 hashes. However, only 11 shares/packages have been accepted. The Is there a possibility to set the miner SW so it submits to the pool as soon as a share is found? It seems to send them in packages which sometimes have 4-5 seconds in between but sometimes a much as 80 seconds. I would like to submit packages of hashes much more often. How can this be influenced? What exactly are the Getworks (GW)? What exactly are the Accepted ones (Acc)? This is where the TipBounty is. Help us to get a better Acc/diff1 ratio. Best would be 1:1. What exactly are the rejected ones (Rej)? What exactly are the discarded ones (Disc)? What exactly are the difficulty one hashes (diff1)? Now some of these questions seem very very basic but it is important for us to understand what these are and how we can influence these. We have a 1:1 correlation between the Acc and the pool side acknowledgement of shares/packages. So whenever the MinePeon shows one more for this value the pool value for last submitted share goes to “moments ago”. Does the miner SW have a setting where we can set after how many diff1 hashes a package of hashes is sent to the pool? If no, do you have another idea why so few are sent? Ideally we would set it so the diff1 hashes are sent every 5 seconds or so, probably even more often. Is stratum with fixed diff1 possible? If so, would it be better to use stratum? Are there critical settings if we should know of? (we have tried --request-diff and --no-submit-stale) We are using BFGMiner on MinePeon if that matters. We could switch to CGMiner if that would help. Any help is very much appreciated. The museum is doing a great job explaining Bitcoin basics. We had special focus on interactive learning and have several things to underline this. I hope to hear back from you so we can improve our installation. Please don't hesitate to ask if you have further questions. We are both not mining experts. Thanks for reading and AMA. SimonBelmond Current features of the Bitcoin exhibition at the Zürich MoneyMuseum: Current Features:
Life screen with various stats/charts/parameters/transactions…
Muscle powered PoW: Hand generator with 5v and 3.5-5A output, Raspberry Pi, MinePeon, 5x Antminer U2+ plus a screen to show the hash-rate at the pool and/or in MinePeon web interface. This screen will not be hand powered. This installation will complement their coining die (go to 1:27 to see what I mean).
The Bitcoin mining evolution (CPU, GPU, FPGA, ASIC)
A few short (2-3 minutes) interviews.
Other wallets, Trezor, PiperWallet
ATM Prototype, functional
PiperWallet to use.
Casascius and other physical Bitcoins, Wallets (also some commemorative coins), Paper wallet like one out of the first Bitcoin (A)TM ever
12 Picture tours
Bitcoin for beginners
Debunking 13 Bitcoin myths
What you definitely have to know
The history of Bitcoin
Bitcoin und traditional forms of money
Alternatives to Bitcoin
Citations about Bitcoin
How do I open an account?
How do I get Bitcoin?
Bitcoin community and economy
Bitcoin as a platform
I see this as a good opportunity for Bitcoin, so let’s embrace it. I am especially excited to compare the traditional forms of money which used proof of work to the new money which also uses proof of work. I think in that context it will be much easier for the visitors to value this concept. A lot of schools and other groups book guided tours at the museum. It is open on every Friday from December 05. On. Entry is free of charge. Edit:Markdown, typos
So it has become apparent to me from the constant questions on this subreddit that a lot of new miners/shibes need help, so I have decided to make a basic guide to most of the questions I see a lot here. 1) BTC - This means Bitcoin so If you see a miner that says BTC it does not work with dogecoin because dogecoin is Scrypt. 2) Scrypt - This is what dogecoin runs off of, or what your computeasic/gpu solves to support the network. 3) Asic - This stands for an application-specific integrated circuit, or in less confusing terms a miner dedicated completely to mining a particular type of coin such as dogecoin. 4) GPU Mining - Using a graphics card to mine crypto currencies. 5) CPU Mining - A slow and inefficient way of using your computers Central Processing Unit to mine crypto currencies. 6) Hash Rate - The rate at which you mine a crypto currency. The higher the better. 7) KH - This Means Kilo Hashes. 1KH = 1,000 Hashes a Second 8) MH - This Means Mega Hash - 1 MH = 1,000,000 hashes a second. 9) Should I buy an asic? - If you want to support the network yes. If you want to solely make money off of it No. Buy the coin if you want to make profit. This is my opinion, there is no one answer to this question. 10) Mining Pool - Pooled mining is a mining approach where multiple generating clients contribute to the generation of a block, and then split the block reward according the contributed processing power. Pooled mining effectively reduces the granularity of the block generation reward, spreading it out smoothly over time. Tl/DR You Work with other miners to solve stuff faster making you money faster. 11) Mining Difficulty - How hard it is to solve the problems to generate dogecoin. 12) Do I need a fan? - Yes I cannot stress how important it is to properly cool your units. Make sure your units are always cool or else they might melt. Do not think you are safe just because you turn your ac up, but a fan. 13) What Mining Pool Should I Pick? - Here is a list of all of the pools Pick one that works for you. 14) What is a wallet? - This is where you store your dogecoin and where you can send and receive dogecoin. 15) What Wallet Should I get? - Online is convenient but not safe. Paper Is the Safest But Not convenient. Cold Storage is the mostly safe and somewhat convenient. 16) What is cold storage? - Basically putting your wallet on an offline device like a usb. 17) Can I mine on a mac? - Yes look here for more info. 18) Cloud Mining - A service you buy that mines for you. you pay for a certain amount of hashes, lets just say 10gh for an example, and the company/service mines you this amount for the time you bought. It is not profitable usually. 19) What Is a Raspberry Pi? - A small cheap computer that people use to run their miners on. 20) Watts - The measure of electricity. 21) Should I pre-order? No Never F%&$ing pre order, you will get scammed 99.9999% of the time. 22) Can I still mine? - Yes, you probably wont make money but you will support the doge community. 23) Linux - An operating system like windows that people use to run mining programs on. 24) If you Have an animal make sure to properly protect your mining rig from them. Wires from the machines make great chew toys. 25) How Do I calculate if im going to make money with my mining rig? - Use This mining CalculatorThis is also a very good calculator 26 What Mining Program Should I use? Windows: CG MINER Mac: Astroid Linux: CG Miner again Goodluck mining I hope this helps. This Also Took A long time to make so support would be appreciated :)
Want to get started mining defcoin with an ASIC and a Raspberry Pi? Does 360 KH/s of mining power sound appealing? Here’s how to do it. https://pbs.twimg.com/media/Blpj8IvCcAEIStY.jpg 1) Hardware List -Raspberry Pi Model B --SD Card --Micro USB power supply --Ethernet cable -Gridseed ASIC --12V power supply (5.5mm/2.5mm barrel connector) --USB to Mini USB data cable The main component is the Gridseed ASIC, which will be doing the Scrypt calculations. The Raspberry Pi will be used as the controller for the ASIC, and will be doing the communication with the mining pool. If you’re not familiar with the term, an ASIC is an Application-Specific Integrated Circuit - basically a chip with a single purpose, like mining crypto currency. Using an ASIC will allow us to mine more efficiently than we would be able to with general purpose hardware. The ASIC that I’m using is a “300+ KH/s Single Gridseed ASIC Miner”. It looks like a CPU heatsink with a fan attached. There is actually a circuit board with 5 ASIC chips sandwiched between two halves of this heatsink, and has a mini USB connector and a power connector sticking out the side. There are a few places where you can buy these. I bought mine at GAWMiners.com for $130. That was the lowest price that I could find, and I had a good experience buying from them. Use this link, and you can get $20 off of a $200 order (and give me some referral points :-)) GAWMiners. You can also find other vendors by searching for “Gridseed ASIC”. You’ll need a 12V power supply to power the ASIC, and a USB A to USB Mini B cable to connect the ASIC to the Raspberry Pi. I’m using a 60W power supply, which seems to be working fine for defcoin (Scrypt) mining. These ASICs can also mine Bitcoin at the same time, but you may need a beefier power supply if you want to do that. The Raspberry Pi can be purchased at any number of places- Amazon, SparkFun, AdaFruit, etc. I’m using the Model B because I had one already, and also because it has a built in ethernet port that will make connecting to the internet easy. Make sure to get an SD Card and a micro USB power adapter to get the Pi up and running too. 2) Software If you haven’t already, download the defcoin wallet from defcoin.org. If you want to do pooled mining, create an account for one of the defcoin pools, such as redbaron.us or whichever other pool you want to mine. Once you’ve created a pool account, make sure to create a worker too (for MPOS pools, that will be under My Account > My Workers). The password for your worker does not have to be the same as the password for your pool account (and it probably shouldn’t be). Next, download the latest Raspbian image from raspberrypi.org/downloads/ and install the image to your SD card. Instructions for installing the image can be found here. If you are using the dd method on a Mac, make sure to use /dev/rdiskX instead of /dev/diskX - both will work, but rdiskX is much faster. Once you have the image installed, put the SD card in the Raspberry Pi, connect the Pi to your network, and connect the Pi to your micro USB power adapter to power it on. Next, SSH in to your Raspberry Pi with the default username and password pi/raspberry. I use nMap to find the IP address that has been assigned to my Pi. You can also use an HDMI display and a USB keyboard to log in instead of using SSH. After logging in for the first time, run through the wizard that comes up to configure your Raspberry Pi. The defaults are fine for most things, just make sure that you don’t skip the step to expand the filesystem to use the rest of your SD card. If you don’t expand the filesystem, there won’t be enough space for other software. Once you have Raspbian installed, and have gotten through all of the first login setup stuff (which will likely end with a reboot), log back in to the Raspberry Pi with the pi user. From the command line, run sudo apt-get update sudo apt-get dist-upgrade There are some stability issues with USB communication between the Raspberry Pi and the Gridseed ASIC. Enabling SLUB debugging seems to resolve this, at least well enough to prevent the Raspberry Pi from freezing every so often. Open the /boot/cmdline.txt file, and add the following text to the end of the line. Don’t add a new line, just add this to the end. You can use vi, nano, or whatever your favorite text editor is to do this.
Reboot the Raspberry Pi once you’ve added that flag to your /boot/cmdline.txt file.
sudo shutdown -r now
Log back in with the pi user once the Raspberry Pi is finished rebooting. The mining software that we’re going to use is a customized version of cgminer that has support for the Gridseed GC3355 chips that are used in our ASIC. There are a number of different mining programs out there, this is just what has been working the best for me so far. First, install git and dependencies needed to compile cgminer.
cd cgminer-gc3355 autoreconf -i ./configure --enable-scrypt --enable-gridseed make
Once the make command finishes, we’re ready to run the mining software. You can also run make install if you want to install the software, but running it out of the build directory works just fine. Plug in the power supply for your ASIC, and connect the ASIC to it. Connect the USB cable to the ASIC and to your Raspberry Pi. Run the mining software by running the following command. The -o option specifies your pool URL, the -u option specifies your username and the workername that you set up for the pool, and the -p option is the password for your worker. There are a couple of options available that are specific to the gridseed ASICs, and those will be placed after --gridseed-options. The freq=850 option sets the clock frequency of the ASIC to 850 MHz. There are other clock options available, but 850 seems to be working best for me. I was getting hardware errors at 900, and a lower average hash rate. I am getting about 360 KH/s with the clock frequency set to 850.
This command needs to be run with sudo in order to access the USB hardware. You can also create another user specifically for mining, or grant the pi user the appropriate permissions if you don’t want to run cgminer as root. When you run this command, you should see output from cgminer showing that it is communicating with the mining pool, and something showing your hash rate. If you’ve gotten this far, and you’re seeing output from cgminer showing a hash rate, congratulations, you’re mining defcoins with your ASIC! There are just a couple more steps to do if you want to let your Raspberry Pi and ASIC continue mining without needing you to be logged in. To keep cgminer running after I log out, I am using nohup. You could also use screen instead of nohup. Create a script (startMiner.sh) by running the following commands.
If you run this command with sudo startMiner.sh, cgminer will run in the background, and will continue running after you log out. If you want to have this run when your Raspberry Pi boots, modify your /etc/rc.local script so that it executes this startMiner.sh script. Your /etc/rc.local file will end up looking like this:
# Print the IP address _IP=$(hostname -I) || true if [ "$_IP" ]; then printf "My IP address is %s\n" "$_IP" fi /home/pi/startMiner.sh exit 0
Bitcoin value. Current value at ~1000 USD. Profits above calculated at 900 USD Bitcoin difficulty: 1,180,923,195 Bitcoins per Block (BTC/block): 25 Conversion rate (USD/BTC): 900 Hash rate: 100 GH/s Electricity rate (USD/kWh): 0.09 Power consumption (W): 3 Time frame (months): 3 Cost of mining hardware (USD): 3011.98 Profitability decline per year: 0.61 Difficulty 1,180,923,195.00 Mining Factor 100: 0.04 USD/[email protected]/s Hardware break even: 84 days Net profit first time frame: 279.64 USD Coins per 24h at these conditions: 0.0426 BTC Power cost per 24h: 0.01 USD Revenue per day: 38.33 USD Less power costs: 38.32 USD System efficiency: 33333.33 MH/s/W Mining Factor 100 at the end of the time frame: 0.03 USD/[email protected]/s Average Mining Factor 100: 0.04 USD/[email protected]/s Power cost per time frame: 0.59 USD Revenue per time frame: 3292.21 USD Less power costs: 3291.62 USD Hardware Cost Breakdown: 100GH Overclockable Bitcoin Miner Kit 2,800.00 USD https://megabigpower.com/shop/index.php?route=product/product&product_id=70 RASPBERRY PI MODEL B 700Mhz; 512Mb RAM 41.99 USD http://www.amazon.com/RASPBERRY-MODEL-700Mhz-512Mb-RAM/dp/B009SQQF9C/ref=sr_1_1?s=pc&ie=UTF8&qid=1389015864&sr=1-1 Cooler Master Silent Pro Gold 800W 169.99 USD http://www.newegg.com/Product/Product.aspx?Item=N82E16817171057 Whatever amount you want to invest determines your percentage of the profits. Example: Total Investment Cost: 3011.98 USD Investor #1: 75 USD = %2.4 Profit Share, net profit of 6.97 USD after 3 months Investor #2: 500 USD = %16.6 Profit Share, net profit of 46.50 USD after 3 months Investor #3: 906.60 USD = %30.1 Profit Share Investor #4: 1505.99 USD = %50 Profit Share 874.16 USD net profit after 3 months with a $800 investment. Mining pool fee. Typically 3%. P2Pool offers 0% mining pool fee. https://github.com/forrestv/p2pool
Josh Garza here to set the record straight for /r/Bitcoin and the community
Dear /Bitcoin and to our many satisfied Customers reading this, and other onlookers who have most likely been deceived at this point with the negative portrayal of what GAW Miners and PayCoin are all about, both of which are truly revolutionary concepts (I will address that later). It has come to our attention recently that a lot of wild accusations have been flowing, threats, lies and downright deception especially influencing my (PayCoin and PayBase) appearance at the upcoming Bitcoin Miami North American Conference. I have been in direct contact with Moe and he has expressed some concern about my (PayBase) appearance and speaking. First of all, let me address the issues of GAW/PayCoin being a "scam" or "fraud." I will include some user reviews from a few of our unsatisfied customers that we have "Scammed." Review: New user, first post here. Boxes have started arriving in the mail, and I just wanted to give some major kudos to GAW and Josh in particular. We took a gamble on you for this pre-order business but I'm starting to breathe much easier now. GAW has delivered on absolutely everything they've promised, and much, much more. - store credit to compensate for Gridseed price drop - next day, free shipping on product launch - non-stop engagement on this forum by Josh, keeping us informed and answering questions and concerns - excellent response to customer service inquiries - free zenminer controllers Oh. My. GAW. Seriously. I just keep getting more than I ever expected. And I'm sure I'm missing some. This level of customer service (especially in this particular business) is unprecedented, and I have to believe that this product launch is a loss-leader when everything is tallied. BUT... GAW has made a loyal customer here, and probably many more. Whatever the mining future holds, I can't wait to see GAW play a major role in it. Keep up the great work. Review: I just got the unexpected Zen Controller / Raspberry Pi gift from GAWminers. Thank you so much! I've never received a outright gift like that from a company before. And I got tracking for my Week 1 Fury - maybe slightly behind schedule but the free upgrade to DHL courier more than makes up for that. It will get here days sooner than regular post. Thanks for everything GawMiners! Review: My Black Widows are running for a few hours now, the mentioned 18mhs seems about right. Variance is quite high but in the long run it's arund 18mhs. So getting 18mhs for an advertised 13mhs machine is quite outstanding if you ask me! Cheers and thanks GAW-team Review: I have a Fury hosted and can report of the same hashrate, very happy, too :-) Review: My miners have been up and running for a few hours now so I thought I'd report the hash rates I'm seeing. Black Widows - portal and poolside, 18MH/s! Fury - portal, 1MH/s, poolside, 1.6-1.8MH/s! Review: Wow, I am beyond happy. GAW delivered early and the miners are producing way over advertised hash rate. What more could you ask for? Awesome. Cool Only down side is instead of taking those $750 used G-blades of your hands I'm gonna have to buy another Black Widow now. Cheesy Review: Another happy GAW customer here. I've ordered (and received) 2 Gridseeds from them in the past and just completed an order for a Fury. Very happy with the service (Amanda was great!) and looking forward to getting the Fury and included Zen Controller! Review: Received 2 days ago, super easy setup and running at 1.3-1.8 mhs. Great customer service and Zencontroller is amazing. Waiitng to see those week one prices again. Keeep up the good work gawminer Review: 1 week Fury. Im very happy with this product. Nice hash 1.3-1.4 MH/S in my pool. Working good with free ZenControler. What else? Review: Received my ZenMiner 1 day before receiving my Fury , Web page is easy to access , nothing hard to config , ZENOS as been updated now we can see accepted shares etc.. much better now , and will probably be much more better in a few days Review: I bought a Black Widow from GAW after my Cyclone from Zeus. My Black Widow shipped AFTER my Cyclone, and my Black Widow is hashing away at 14MH/s while my Cyclone sits in a Chinese warehouse being probed. I'm definitely unhappy with my Zeus purchase and wish I had put that money towards a bigger box from GAW instead. GAW seems to be the perfect company to buy hardware from at this moment. Where zeus was first in the spot of: best hardware company, now GAW does. They offer free shipping (or for 25 bucks express shipping), and are a lot cheaper than Zeusminer. And oh they even give a refund... I think about 80% of the people would actually cancel their order if it would be possible, and go to GAW miners. But maybe I have an image of GAWminers which isn't realistic I'd go with GAW again in a heartbeat, they even take cc's which makes this easier. Still think we are a fraudulent company ripping people off? GAW has reinvented the mining industry and its been an amazing ride and we are so thankful to everyone in the community that has supported us. GAWMiners and zenCloud lets you generate an ROI faster and more reliably by giving you instant access to your hardware, allowing you to start mining the same-day you purchase, maximize uptimes, and eliminate the shipping and power costs. ZenCloud hosted is the most profitable and more convenient way to run your miner, period. We have continued to improve all of our products and increase hashing power while lowering costs at a rate unprecedented in the industry. Anyways, let me move on to PayCoin and I could not be more excited by the feedback we have been receiving so far. A lot of people are bringing up the $20 floor for PayCoin or other promises we have claimed to have made. We did not backpedal on this issue, there was never a time that we meant that everyone in existence could cash out instantly and we would support that. We have some very large investors and capital supporting us (I am however not allowed to give specifics on this) who are backing the $20 price, however obviously this doesn't apply to everyone. The same thing would happen for Bitcoin or other cryptos, for example the price of Bitcoin now is around $315, however if every bitcoin owner in existence went to exchanges and tried to sell the price obviously would crash very hard down to $0 very quickly. So PayCoin and Bitcoin are extremely similar in this manner. However, we are committed to the $20 price, even if it may not be that way right now. As a help if people could buy or trade bitcoins for XPY this would certainly help that happen quicker, if anyone here is thinking of doing so all I can say is it would be an extremely sound and fruitful investment (lots of cheap coins available currently). $20 is more of a target we are going to enforce rather than a floor which I don't believe I have ever said. Moving on to the Amazon and PayCoin integration issues. With PayBase Express we are working on the goal to shop with Paycoin on the Amazon, Target, Walmart, Macy*s and Best Buy’s online stores. This is something you can't do currently with Bitcoin or other crypto's, so I think this is one of the main points of why there has been so much negativity in the past several days from other camps, in a few words its jealousy but I am not going to play the pretend psychologist here. Due to legal reasons, I am not able to say when/if this will happen exactly since we are working with other large investors and partners who will be handling the interface and a large part of the legal/technical aspects of this and NDA's, however it is our dream and goal to build the world’s most advanced online payment system in world - Paybase. We hope to be ready to unveil the results of those efforts very soon! Lets say it will work like PayPal but the PayPal overseers don’t get their cut or say-so. Since the merchant pays less to process your order, it will cost you less, and so we pass those savings back to you. Let me reiterate the once in a lifetime opportunity people have now to get in the ground floor of cheap coins which I absolutely hope will revolutionize currency and the internet as we see it today very soon (not to mention make the early investors very very rich!) :) On this note, I am discussing with Moe to possibly make a separate, private consulting seminar at BTC Miami after the Q&A session (which due to my schedule I may or not be able to make). It would be a private meeting type scenario after-hours from the conference with a select group of people willing to pay the fee to really get an inside edge of the crypto industry and a pilots seat to the future by having a direct private meeting with me and speaking with me. Price for this would probably be between $1-2000 per head however its just a preliminary idea I have been shooting around and it isn't set in stone yet. To sign up for this please PM me or message me on my Twitter twitter.com/gawceo (more details to come). So, now that I believe I have set the record straight on all these accusations, I would really like to express my frustration with all these claims of "Fraud" and "scamming" that have been popping up lately. (Please, if you have been banned from our forums take that as a message that you are not welcome back in the future). These Reddit people are extremely hostile and confused individuals, mostly spreading lies and deception out of jealousy or fear (I don't know). I am personally investigating and directing my legal team to investigate and take full legal action against on this Reddit of users who posts or comment lies or deceptions, and possibly even Reddit.com for facilitating this. Let this serve as a warning for other people who may want to speak negatively about my companies, PayCoin, GAW, PayBase and my person Josh Garza, we are investigating full legal action against Reddit.com website and users who have posted negatively. In short, don't piss me off or you will regret it, please delete your lies and posts if you want to save face and avoid full legal action which I am pressing for now against everybody. XPY and PayCoin are probably the best opportunity you may see in your lifetime to get in on the ground floor on a platform and currency that will transform the internet. The price right now is the biggest bargain around and Paycoin will be the most successful coin launch in history and moving forward, think of Bitcoin on steroids pre-bubble, and we aren't stopping until its Moon. Anyone on Reddit.com or reading this can buy Paycoins here on the main website. See you in Miami! Sincerely, Josh Garza GAW CEO
I am selling a 6 Gh/s Bitcoin and SHA-256 altcoin mining rig. This comes with 3x Antminer U1s over clocked to 2 Gh/s, Arctic Breeze Usb Fan, 10 port powered usb hub, Raspberry Pi Preloaded with Minepeon ( More Info about that here http://minepeon.com/index.php/Main_Page ) a 8 GB SD card, and a Hard Shell case for the Raspberry Pi (Instronctions on how to set it up are in the box). It is in perfect condition and works great. If you want you can upgrade the hash rate by simply adding more miners or even faster miners. if you have anymore questions comment below! Pics http://i.cubeupload.com/mQPeR6.jpghttp://i.cubeupload.com/wKkSZp.jpghttp://i.cubeupload.com/oB5vKB.jpg Price = 350000 DOGE + Shipping I accept Bitcoin Dogecoin and Paypal. (I dont have many stats to display as I am new to Reddit)
7Th/s KNCMiner Jupiter and Bitfury Bitcoin Miners 7000Gh/s KNC Not Cointerra for sale best offer in BTC gets it.
Listing a package of mining gear that averages about 7Th/s at the pool, in this case BTC Guild. Hash rate will vary between about 6800-7050 but could move by as much as 10% like most miners. I cherry picked a number of units from my collection of primarily KNC gear to focus on high performing systems that provide a great hash rate with reasonable Since some potential buyers have asked I pulled up a Bitcoin calculator for 7Th/s with BTC = $560 USD. Obviously with the variable exchange rate, and difficulty increases estimated it's a possible look but not for sure. This Difficulty Coins Dollars per Day 0.70310438 BTC $393.74 per Week 4.92173067 BTC $2,756.17 per Month 21.37437318 BTC $11,969.65 this diff (est) 4.59761908 BTC $2,574.67 Next Difficulty [estimated] Coins Dollars per Day 0.61923263 BTC $346.77 per Week 4.33462844 BTC $2,427.39 per Month 18.82467208 BTC $10,541.82 All KNCMiner systems running 1.0 firmware with custom clock and voltage settings, clock settings I use not allowed in the stock firmware but all running solid and tested for weeks now. All units have custom fans installed to help maintain ASIC and VRM temperatures. To maintain the listed hash rates units will need to be run with covers off, ambient temperature where I run all KNC units in my crowded basement is about 78F. 6 x KNCMiner November Jupiter with EVGA 1000W Power Supply - 5500Gh/s 1 x KNCMiner October Jupiter 6 module with Lepa 1600W Power Supply - 1025Gh/s 1 x Bitfury 16 Card System with Raspberry Pi 32GB SD and custom Case, Thermaltake Power Supply - 500Gh/s Pics available upon request. Send me an offer want to sell today.
😀 Selling my beloved KnC Titan. You may contact me to negotiate a price or bid for it on eBay: https://www.ebay.com/ulk/itm/282020692715 • KnC Titan Scrypt/Scrypt-N miner first batch hashes always around 300-320 MH/s. • Running stable for over 210 days. • Less than 0.5 % of rejection rate. • Latest KnC firmware version 2.00. • Watch it working on YouTube: http://j.mp/20P4WWA. • Never used custom firmware nor modified cubes. If interested you may try Linus Dunker's "How to improve KnC Miner Titan" as shown here and/or buy GenTarkin's Mod firmware here for $75 USD. • Always used in multi-pool to get paid in Bitcoin. • Original price of $9,995 + shipping. You're getting your ROI much faster than me! ⬜️ ⬛️ ⬜️ ⬛️ WHAT IS INCLUDED ⬛️ ⬜️ ⬛️ ⬜️ 💰 Hint: A money-making machine • Original box where the miner arrived from Sweden. • Four 28 nm cubes capable of mining over 80Mh/s each. • One Raspberry-Pi based controller card with its own SD card. • One 850 Watt Thermaltake Toughpower Grand power supply ($160 USD value) • One 1275 Watt Thermaltake XT Platinum power supply ($265 USD value) • Four PCI-e 16 AWG wire cables (One for each cube) • Two 24-pin main power connectors with one paper clip each to power on the device. ⬜️ ⬛️ ⬜️ ⬛️ KNOW BEFORE YOU BUY ⬜️ ⬛️ ⬜️ ⬛️ 😅 You MUST know what you are buying! • Due to the nature of crypto-currency mining, the equipment is sold AS-IS. • Configuration will be reset to factory defaults before shipping. • Shipment will include insurance. • I will make ALL efforts possible to provide cushion and try to provide safe shipping, but No returns will be accepted. • The KnC Titan miner will ship in its original box and both power supplies will ship in a separate box. You will pay only for shipping of the KnC Titan miner and I will pay for the shipping of the power supplies. Both shipment should arrive at the same time. • Local pickup preferred. • If paying with Paypal, the miner will ship after payment clears. • ฿ is gladly accepted 15Ln76KXXYWv7xSRqxct3Aehsh69CVUhUu, contact me for further details. Go to eBay for bidding or contact me directly to negotiate a price. 🌎 https://www.ebay.com/ulk/itm/282020692715 📷 See pics of it here: http://imgur.com/a/0JLHq
[Table] IamA founder of Tindie, "Etsy for Tech". Started on /r/Arduino, team of 5, just finished fundraising (pitching 50+ investors), and have now closed $1m+ in funding. This is a follow up to last year's AMA, for anyone interested in startups/tech/Silicon Valley/open hardware. AMA!
Verified?(This bot cannot verify AMAs just yet) Date: 2013-12-02 Link to submission (Has self-text)
Great questions - as a maker, our rates are lower than Amazon - flat 5% of the order. We also reach a core audience of people like you, which tends to mean you'll sell more on Tindie vs Amazon. As an example, one seller sold exclusively on Amazon, opened a Tindie store, and we began out selling Amazon. He closed his Amazon store and now sells exclusively on Tindie.
As a buyer, you are joining a community of likeminded people from all over the world and in different niches. Some like audio, some drones, others lighting. In the new year we are launching more features to build out the community side of the site. We are a community marketplace - community comes first. We can do a better job on the community side, and those features are currently being built.
Sounds like you are now at the crossroad where people either keep going, or 'never have the time.' When I started, I'd get the occasional comment online, 'You'll never figure it out.' It's a pretty accurate statement for most. Most don't figure it out. If you can put your head down and just grit it out, you'll get to the other side.
If you want to grit it out, start with Learn Python the Hard Way. Then figure out a project you want to build and go build it. You'll pick things up as you go. You'll think you have it about 10 times before you really have a solid understanding. There were many times I'd talk to my friends and say "Oh I figured it out." I was wrong 10 times :)
It took 1 year to get to n00b level. The next year is when things settle in. After 2 years, you'll have a solid foundation to keep honing your skills. You won't know everything, but you can hack together projects, & figure things out.
Also checkout Stackoverflow. Learning how to properly break down my problems into questions was a great exercise. It helped me understand what the real problem is vs what I thought it was.
I did - my first job after learning how to code was as a developer advocate. Not 'coding' but putting what I learned to good use. That company was acquired, and I eventually became a web engineer at the company which acquired us. That was my last job before starting Tindie.
Good question - the only market validation I did was ask the question on /Arduino. There wasn't a marketplace for this type of hardware (we are still the only "big" site doing what we are doing). The space is emerging now.
You are right. The big question I got from investors is actually - 'How big is the market?' Unfortunately there isn't a good answer for that bc the market is growing / being defined now. Arduino/Raspberry Pi/Drones/3D printers are all just getting started and all growing like weeds. If those platforms become as big as we think they will, then a site like Tindie will have to emerge.
The one thing we look at is the components market is a massive, multibillion dollar market. The type of components that are on Tindie, generally speaking, first come to market on Tindie. The market potential is entirely untapped. However having orders from gov't agencies & large businesses is very reassuring that there is a much greater opportunity than just hobbyists (which is what most people thing on first glance).
Biggest Challenge as CEO - Communication, balancing expectations, keeping everyone on the same page from users, employees to investors. You'll constantly hear, "Did you see X?" when someone thinks it is a competitor. Chances are it isn't and they have their own idea of what the business is which is different than your own.
Wisdom to start a startup - If it is a tech startup, one of your cofounders must be technical. Either yourself or your cofounder. If you can't build the first version/ a proof of concept yourself, start there. If you aren't technical, and don't know anyone technical, learn. In the valley you hear, "I'm looking for a techincal cofounder." so many times its crazy. You either already know someone (a good friend usually) or you don't. Trust me , you won't 'find' a techincal cofounder.
Sure thing - if you hire a 3rd party, you will always have to pay someone else to iterate on the site. There is a 0% chance it will be right on the first shot. Therefore its really an invitation to spend a lot of money down the road - not just the upfront cost you are spending to get your idea made. This is what I did with Knowble - it cost something like $20k+. Please learn from my mistake :) You'll have to iterate, make changes, learn as you go. If you know how to code, then you can make those changes yourself. You'll do it in the morning/nights/weekends and it will only cost you your time.
Very cool! Getting press / outside attention is very difficult (if you don't pay for PR - we don't pay for PR). Write blog posts, like to those sites. The link love will go a long way (over time). Most of the companies that you read about on TechCrunch, PandoDaily, etc are paying for PR which is why they get listed on all of those blogs and have stories come out at the same time (embargoes). As a student, build something! Just keep building things. You have some free time - take full advantage of it. Also meet your peers. Build a network of other students in your class. Some will go to Google, Twitter, the next Google, the next Twitter. Increase your chances of doing well by meeting as many super smart people as you can. Build projects with them. Just make things and learn from experience.
The site was already live, we had products, orders, traffic. The sales early on were ~doubling month over month. Sure they were small but that seems like a very good sign. As it kept growing, people around me connected me with other people interested in the space. The first investor I got was someone that was in my network already, but I didn't know him. He also invests in early stage companies, understands marketplaces, and believes in the changes we are seeing in the hardware space. From introductory call to email saying, "I'd like to invest" was about 12 - 18 hours.
We didn't have to iterate on the site, but I did iterate on the messaging/how I frame what we are doing depending upon the investor, and how that message was received by the last investor. I was constantly iterating what I said from pitch to pitch.
Definitely - 100% worthwile. I had saved up enough to live for a year without a paycheck (without healthcare...not smart but I did it). If you are interested, go for it. While you still have a job start learning HTML, CSS, some basic things. Give yourself some sort of foundation before taking the plunge. After a year won't be able to get a job as an engineer, but it will definitely help in the long run. I have never regretted that decision.
AirPi - Two 17yr olds in London built a shield for Raspberry Pi to turn it into a weather station. Brilliant, cheap product that I never saw coming and has done amazingly. They had to incorporate in the UK, take a loan from their parents, and just shipped hundreds of preorders they got on Tindie. The only thing I know for certain is we will have tens of thousands of hardware companies emerge over the next few years because it is becoming cheaper to prototype and easier to manufacture in lower volumes. Yes "hardware is hard" but it is getting easier and that only opens the door for more people to come in.
Tapster - a robot for manual app testing on mobile devices. EVERY mobile app developer in the world should have one bc of the time you'll save.
Good question - you'll need to figure out where your initial users are and tell them what you are doing. Get people in your corner. As you build the site, give them updates, let them sign up before the site is live. If you don't have enough users on day 1, do more to drive more users to the site. Launch only when you have some amount of users (few hundred or maybe a few thousand is the best case scenario). You'll never be ready to launch but definitely give yourself some momentum before opening the doors.
I did this by keeping everyone on /Arduino in the loop. As I found a name, a domain, logo, I'd share those updates. Sellers were able to sign up and "stock the shelves" prior to launch which meant once I opened the site for transactions, we had ~20 sellers/ products on the site and orders on day 1.
Not right now. Bitcoin is too volatile. From talking with other marketplaces that implemented Bitcoin, the % of transactions that come through are very, very small. Most people seem to be holding Bitcoins as an investment strategy (the gold analogy). I think that is true. At this point, we can get a much bigger bang for our engineering buck by working on other features vs implementing/maintaing Bitcoin or a similar digital currency.
I had been in SF for 4 years, then moved to Portland after the last company I was at was acquired. I moved back bc missed friends and our head of engineering is in Mountain View too. Made sense from a personal perspective.
Would I move to the valley if I didn't already have a connection to the area? I'm not sure. It is definitely cheaper to live somewhere else. However it is more difficult to get into the community from outside the area. If you live in the the valley, you'll constantly hear about startups/tech and meet people who are part of the scene. It's easier to be a part of the conversation if you are in the area.
Very true. It is very common for people to stay at a job for one year, vest 25% of your options, and leave for the next hot startup. It is valuable to have a presence in the valley - but not necessary for your team to all be there. I'm a huge fan of distributed businesses.
Hey Chris! I think it will gain in complexity - esp as parts come down in price, and manufacturing lower quantities becomes more accessible. The opportunities only get magnified as those two trends accelerate.
I think we will always have low level / low end products, but the sky is the limit - in terms of price point and customers. We already have products that cost pennies to $1k+. We will begin to have more consumerish products - but I think those will fuel growth in hardware. The more interesting products emerge, the more interested people will jump into diy. Very cyclical. Arduino & Raspberry Pi just make that first step so much easier. Gateway hardware drugs.
It is difficult but not impossible. Things to plan for: taxes & attorney fees. You'll want to set up your business correctly if you plan on raising outside investment. If you don't do that right up front, you'll get bit when you fundraise. The legal fees we'll have for this financing round will be over $10k I bet (probably more)
Google is your best friend. There are books, tutorials, but just dive in. If you have some coding background just get started. Fortunately that is where I started so its more a process of picking something up and playing around (vs starting from 0).
Thanks! A this point it is just closing and collecting checks so the final % will be set in a few weeks once we have a definitive amount closed with this round. However the answer you are looking for is 20%-25%.
At this time last year, I forget where we were with users but we had $3600 in sales that month which would be about 100 orders. When talking to early stage investors, it is very much a gamble. The chance of failure much higher, but then again the opportunity is great. I haven't asked them point blank, but I think it ultimately boils down to they have an idea of how the world will work in the future, and you fit in that narrative.
We don't right now and don't have any plans to in the future. Copying answer from another question "Bitcoin is too volatile. From talking with other marketplaces that implemented Bitcoin, the % of transactions that come through are very, very small. Most people seem to be holding Bitcoins as an investment strategy (the gold analogy). I think that is true. At this point, we can get a much bigger bang for our engineering buck by working on other features vs implementing/maintaing Bitcoin or a similar digital currency."
Good question - once you are ready, you can list it as a Fundraiser (our version of crowfunding which really is just accepting preorders). It has to hit the min # of units sold to 'live' where we bill the orders and you fulfill those ordered. That will give you a good idea of the initial demand. Shipping & handling you'll need to do a little testing on your end bc it depends where you are located & the shipping service you select. Refunds we can handle on our end. You'll just need to tell us which orders to refund. If you have any other questions, feel free to email us at support(at) tindie.com. More than happy to help!
100% from networking. Friend introducing me to someone else, who says you should talk to X. That person sends the intro, and then schedule a meeting. Cold emails don't get you very far with the top investors who are constantly being bombarded with pitches.
Depends ultimately on the investor and if they are the lead or a follow on investor. The lead must believe in the space, have some idea of what is going, and therefore be passionate about the opportunity.
Follow on investors might know something about the space, might not. The one thing I didn't realize is how much they just "pile on." Most investors look for a signal by another big name investor, and if they are investing, looks good and they want in! The pile on mentality is alive and well.
Build it first. If you get traction on the idea/project, investors will be interested. If it is just an idea, you'll have a very tough time. The only real answer - build it and they will come (if it is a great project and they see potential).
I think any hardware product today should have an open equivalent. The opportunity is just sitting there for someone to build an open version of X. Open source if a flywheel. Once you get it started and there is a community to support it, it only becomes stronger and better. At the end of the day, I don't see much difference btwn producer vs educator. If you have an open project, part of your job will be education. Just start working on something. At the end of the day, if you want to produce it and sell it you can. If not, no harm/no foul.
Good question - some investors you won't get along with. You'll have different ideas/ look at the world differently/ it just isn't a fit. If that is the case, probably not a good fit as a major investor in your company. The can email you rather frequently - don't want to hate that part of your job...
Unfortunately not. Get more experienced & become a solid JS developer. Build projects, open the code, get feedback, critiqued by the JS community. You'll have a lot of value as a seasoned JS dev (esp as Node picks up traction)
I'm anti-patent. It is a huge time/money suck and ultimately hinders innovation. I'm not the best person to ask on researching your design/idea/ etc but I'd probably just go ahead build it and go for it. Any time you spend looking for conflicting patents, someone else will launch their version and get a leg up.
We can definitely do a better job on that end. Since you all have an engineering background, most likely the biggest problem will come in execution - sourcing manufacturers, parts, work abroad vs a domestic manufacturer. PM me and we can definitely help!
Raspberry Pi’s low power consumption unfortunately also means a low hash rate which means little to no profit depending on which cryptocurrency you choose to mine. Other factors to consider are power costs where you live and your mining pool fees. To ensure profit, you should consider embedding an external GPU to your Raspberry Pi or find new cryptocurrencies to take advantage of the low ... Was ist die erreichbare Hashrate des Raspberry Pi 2 und Raspberry Pi 3? Klarstellung: Ich möchte nicht wissen, ob es möglich ist, den Raspberry Pi zu verwenden. 4 . pi-3 pi-2 performance cryptocurrency. Link teilen. Quelle. j4ck 2016-06-09 2016-06-09 11:09:11Z. Anzahl der Antworten: 3. Mein Himbeer-Pi 3 Scheint mir bei etwa 400 (ish) Kilohashes pro Sekunde. Dies ist auf Einsteinium mit dem ... Bitcoin Mining mit dem Raspberry Pi zahlt sich nicht mehr aus. Die Entwicklungsgeschichte fand damals nicht ihr Ende. Immer weiter ging es mit den Optimierungen, der Steigerung der Hashrate bei gleichzeitiger Senkung des Stromverbrauchs voran. Die Gesamthashleistung des Bitcoinnetzwerkes kratzt gerade an den 80 Exahashes und stellt neue Rekorde auf. Heutzutage lohnt sich das Minen von Bitcoins ... Bitcoin.SE might be a better place to at least get some of the required details straight first. – goldilocks ♦ Jun 9 '16 at 12:34. 1. Lads, I appreciate the heads up on how inefficent mining with a Pi is - but that wasn't my question. – deepbrook Jun 15 '16 at 8:51. 2. Frustrating as it may be, it's likely that you'll never get an answer to your question without doing your own testing ... Gesamte Hash-Rate (TH/Sek.) Die geschätzte Anzahl von Terahashes pro Sekunde, die das Bitcoin-Netzwerk in den letzten 24 Stunden ausführt. 30 Tage 60 Tage 180 Tage 1 Jahr 3 Jahre Alle Zeit
In this week's education segment, we are exploring the bitcoin hash rate. Hash rates are a measure of the resources used to secure the bitcoin blockchain and are a useful indicator of the bitcoin ... If you are feeling Generous. 1HtszptLXskCrwoVSLUeEugLB2P8S43vUL Finally got my Raspberry Pi configured to mine using my Asics. the Pi runs at 4 watts. the re... Buy Raspberry Pi 4 Model B 4GB: https://amzn.to/2tlBfGW How to Setup a Raspberry Pi 4 Bitcoin Mining Rig w/ Bitmain AntMiner U3: https://youtu.be/dPWTSytzN7g... How to make a Raspberry Pi Bitcoin Mining Rig - Duration: 9:43. Tinkernut Labs 309,090 views. 9:43. How Bitcoin Works Under the Hood - Duration: 22:25. CuriousInventor 2,762,040 views. 22:25 . How ... Learn how to make a Raspberry Pi Bitcoin Mining Rig. Hardware: 330Mh/z GPU - http://goo.gl/QlGVM7 Powered USB Hub - http://goo.gl/nvPzEy Raspberry Pi - http:...