Field Programmable Gate Array (FPGA) – BitcoinWiki
Field Programmable Gate Array (FPGA) – BitcoinWiki
FPGA Mining: What is FPGA Mining in Cryptocurrency ...
Open Source FPGA Bitcoin Miner - Bitcoin Wiki
Bitcoin mining with FPGAs FPGA Developer
The Best FPGA Mining Guide and Learning Platform FPGA Guide
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
Welcome All to the GPUMining Crash Course! With the increase in prices in cryptocurrency, a lot of people are getting back into mining and a lot of people are brand new to the concept overall. So, I quickly wrote this crash course to help you understand what to expect and how to successfully mine your first cryptocurrency. This crash course isn't gonna have all of the fluff you'd see in a normal publication. This is just everything you need to know to get up and running on your first cryptocurrency mining rig.
What is cryptocurrency mining?
One of the main things about cryptocurrencies is that they are "decentralized". Sounds great, but WTF does that even mean? Well, the easiest way to explain it is... You know how if you want to send your friend/family money digitally, you can do so through your bank. Your bank likely takes a transaction fee and in a few days they will transfer the money. Since cryptocurrencies are decentralized, they don't have a bank or organization to fulfill the transfer of money. Instead, they outsource the computing power of their cryptocurrency network to miners (soon to be you). These miners are verifying transactions, securing the blockchain, and powering the cryptocurrency's specific network among other things. As an incentive, the miners collect transaction fees on the transactions that they verify and collect block rewards while new currency is still being introduced into the ecosystem.
What kind of rig should I build?
You can mine cryptocurrencies using your CPU, GPU, FPGA, or ASIC, but this is a GPU Mining subreddit, so I will cater this to GPUs. For building a great all-around GPU rig, there are two models of GPUs that I'd recommend:
Both of these GPUs have solid hashrates across most mining algorithms and for a decent price! You should be able to find both of these kinds of GPUs used for around $200-$250 each, which is a great price if you know what happened during the last mining craze! ($200 GPUs were out of stock everywhere and people were reselling them for $600+ each) There are also plenty of great AMD GPUs for mining, but I've worked mostly with Nvidia so that's why both of my recommendations are Nvidia and not AMD. Other parts to your rig that you'll need are listed below. Most of these can be pieces of crap and are just needed to make the rig actually run, but the one spot you DON'T want to cheap out on is the power supply unit. A decent power supply unit will keep your home from burning down while also keeping your rigs up and running smoothly. Here are my recommendations:
Motherboard - This Motherboard can hold up to 6 GPUs (considered a full rig) with the use of risers. It is decently priced and will fit nearly any mining rig upgrades that you make in the future.
CPU - You really just need the most basic CPU you can find, it's not very essential to mining unless you're CPU mining, but even then... CPU mining isn't very profitable for how expensive CPUs can be.
RAM - All you really need is about 4GB to keep this thing running. If you want more, go for it, but it's not neccessary in most cases.
Power Switch - Doesn't need to be fancy, just needs to turn the thing on and off
PowerSupply - Don't cheap out here! Pay for a quality PSU and save yourself the headache and be safe with a solid PSU. Get a GOLD quality PSU at a MINIMUM! Platinum is good too, but probably unnecessary. The linked 1300w PSU will support most 6 GPU rigs, if you're going for higher tier GPUs like a 1080ti and above or if you're having more than 6 GPUs on a single rig then you'll need something stronger.
GPU Risers - I use this kind. They work and they're not shitty. They do require 6pin for power. Use a Molex converter if needed, but going 6pin directly from your PSU is best. Your 8+6pin will probably be a little bit short, so you'll need some 6pin extenders. EVGA will sell them you for a few bucks each, but you have to call as they're not listed on the site. DON'T YOU DARE THINK OF USING A SATA CONNECTION UNLESS YOU WANT YOUR ENTIRE MINING OPERATION TO BURN DOWN AND TAKE EVERYTHING ELSE WITH IT! SATA IS NOT RATED FOR THE POWER THAT YOU NEED!!!!
Kilowatt Meter - So that you can monitor your power consumption from the wall (much more accurate than trying to calculate each piece of hardware individually). Also helps when overclocking for a higher efficiency.
120GB Solid State Drive - SSDs are pretty damn cheap now. Just get it instead of your prehistoric HDD. Also, make sure you get AT LEAST 120GB! Many of the popular cryptocurrencies like BEAM and GRIN will demand quite a bit of virtual memory, so you'll need the extra space on your SSD to compensate for that.
Something to put your rig on - This one seems to be popular, but pretty much anything will do. I literally used a shoe rack and zip ties. You just need something that will give the GPUs airflow to breathe and keep the rig organized as a whole.
Windows 10/Linux Operating System - Pretty self explanatory here. Don't go with any of the MAC OS or Apple Products. They're extremely over priced and nearly useless in the mining world.
She's built, now what?
Now you need to do a few things. I am a Windows miner, so I will be speaking to Windows here:
Update Windows - Do all of the updates. Just do it.
Update Drivers - Go to the EVGA website and download GeForce experience. It will keep your GPU drivers up to date.
Go to Windows Device Manager and make sure all of your GPUs show up under "Display Adapters". If it is there, but it isn't showing the Name/Model of the GPU as the name, right click it and select "Update Driver". This should fix it.
Assuming you've done all of this, you're ready to download a mining application.
There are tons to choose from! Claymore, Phoenix, EWBF, LolMiner, etc... It can be overwhelming pretty quickly since they all have different algorithm support, speeds, efficiencies, and a whole lot more. On top of that, in order to get them running you need to set up batch files to call the proper exe, point you to the correct pool, and a whole bunch of other stuff that can be confusing to a new user. Not to mention, you will probably need a separate miner, config file, batch file, etc. for each different algorithm that you're interested in mining on. Instead, I recommend that you download a miner management software that will take care of most of this tedious work for you. There are a few in the sidebar, but the /GPUMining favorite is AIOMiner. It was developed by our very own community member, xixspiderxix with the intention of making mining as easy as possible to do and without any fees. It supports over 100 different algorithms, so you'll be able to mine nearly ANY cryptocurrency you'd like. Just download it from their website and it will take you through a quick tutorial to help you get set up! You can also connect your rig to their website for remote monitoring and control. You've probably seen a few of their posts around this subreddit. Other Windows mining softwares include:
many more you can find from google searching
Note: Many mining softwares have fees built into them. Most are around 1%, but can go as high as 5% or greater! You want a mining software with little or no fees at all so that you get to keep as much cryptocurrency as possible. These fees aren't something you actively pay, the software will automatically take it by mining on the developers behalf for a given amount of time and then switching back to mining on your own behalf. So, please be diligent in the software that you evaluate and make sure it is reputable.
I keep hearing about NiceHash. What is that?
The asshole of the mining industry. Jk, but not really. NiceHash is a software program that allows you to sell your rig's hashing power to someone on their marketplace. They market themselves as profitable mining, but you're not really mining. You're selling your power in exchange for Bitcoin. They did a great job telling people that with them, you're always mining the most profitable coin, but that's just not true. Since it is a mining marketplace, they make you mine whatever their most expensive contract is. If their contracts are below market prices, then you're not operating as efficiently and profitably as you could be. NiceHash also has a sketchy history, which continues to this day. In 2017, they were hacked and lost $65M worth of Bitcoin. No one got paid out for MONTHS and many of their executives conveniently resigned. Their platform is also used to destroy cryptocurrencies. Since people are able to purchase mining power on their platform, people have used their platform to purchase enough mining power to control individual cryptocurrencies and duplicate coins, which increased the malicious user's wealth while completely destroying the integrity of the coin's blockchain. HoriZEN (formerly ZenCash), Ethereum Classic, and many other great cryptocurrencies have been the victim of NiceHash's platform. For this and many other reasons, we highly recommend that you stay AWAY from Nicehash. We understand that it is extremely easy to use and you get paid in bitcoin, but they are destroying the industry with their greed and lack of motivation to change their platform for the protection of cryptocurrencies.
This is pretty much everything you need to know to get started. We covered the hardware, setting up the software, which software to use, and AIOMiner's tutorial will get you up to speed on how to actually mine the cryptocurrency that you want better than I can explain it, so I'll leave that part to them. If you have any questions on this crash course, please leave a comment below where myself and other community members will be able to help you out.
Why is getting into FPGA's such a crappy experience?
I'm a hobbyist and this is my first venture into FPGA's. I understand how FPGA works in theory. It's just a bunch of combinational logic connected by clock-connected flip-flops, whose topology and combinational functions can be programmed with a high level language. I bought a Xilinx board from embeddedmicro.com and I'm going to work through their tutorials. All I want to be able to do is specify a bunch of like registers and crap, and how to connect them with clocked flip-flops to do some really basic stuff like a simple CPU with 1-2 custom instructions or something. So why do I have to download a GIANT SIX GIGABYTE FILE TO DO THAT? What could this software possibly be doing that it needs to be that big? In a sane world, all I'd need is a board and a simple compiler which just takes the high-level language and turns it into the topology file to upload to the board. But in the insanity in which I am currently living, I have to download some gigantic IDE that is going to be huge and probably slower than mining bitcoins on an NES. I don't know because IT'S STILL DOWNLOADING. So to even get to the download, I had to log into the website, register, and give them a name and a physical address (and God forbid I should leave the "Company" field empty!). The Licensing crap on their website looks like you need an MBA to understand it. This company sells pieces of hardware, FFS! Why in Stallman's name can't they just make the software FOSS and let anyone download it instead of all this BS about WEBPACK this and annual upgrade that? Xilinx, in case you haven't noticed, in order for anyone to actually use your software, THEY HAVE TO BUY A CHIP OR BOARD AND YOU CAN MAKE MONEY OFF YOUR CUSTOMERS THAT WAY. CHARGING FOR SOFTWARE OR HAVING A BYZANTINE PROCESS FOR GETTING A FREE LICENSE MAKES ZERO SENSE FOR A HARDWARE COMPANY. Anyone know a place where you can just buy an FPGA board, plug it into a USB port, sudo apt-get install some FOSS compiler, type your Verilog or VHDL or whatever into emacs, run 2-5 commands and have a running design? If such a place doesn't exist, some startup needs to disrupt this industry. If you make it easy for people to develop for your HW, those devs will be inclined buy your product just to make their lives easier.
The report produced by the fire block chain coins Institute, author: Yuan Yuming, Hu Zhiwei, PDF version please read the original text download Summary The Fire Coin Blockchain Application Research Institute conducts research on distributed ledger technology based on directed acyclic graph (DAG) data structure from a technical perspective, and through the specific technical test of typical representative project IOTA, the main research results are obtained:
Compared with the narrowblockchaintechnology,DAGtechnology has its own innovations. In theory, it can achieve high scalability and high decentralization without considering the evil situation. Therefore, there are some security risks.
DAGprojects tend to operate in a decentralized manner, which reduces the degree of decentralization to improve safety, but at the same time the transaction rate is not close to the theoretical limit.
Using a 40-node network based on VPS (CPU for PoW) to conduct a trading stress test on a representative project IOTA, it can be found that the TPS is very low: the optimal result that can be achieved is 4.19.
After analysis, its performance bottleneck is mainly based on the hardware implementation of the hardware itself.If you use other methods such as FPGA, you should further explore the performance potential of DAG.
At the same time, in order to maintain good transaction processing capabilities, a network of nodes of sufficient scale should be established.
Report body 1 Introduction Blockchain is a distributed ledger technology, and distributed ledger technology is not limited to the "blockchain" technology. In the wave of digital economic development, more distributed ledger technology is being explored and applied in order to improve the original technology and meet more practical business application scenarios. Directed Acylic Graph (hereinafter referred to as "DAG") is one of the representatives. What is DAG technology and the design behind it? What is the actual application effect?We attempted to obtain analytical conclusions through deep analysis of DAG technology and actual test runs of representative project IOTA. It should also be noted that the results of the indicator data obtained from the test are not and should not be considered as proof or confirmation of the final effect of the IOTA platform or project. Hereby declare. 2. Main conclusions After research and test analysis, we have the following main conclusions and technical recommendations:
Compared with the narrow blockchain technology, DAG technology has its own innovations. In theory, it can achieve high scalability and high decentralization without considering the evil situation. Therefore, there are some security risks.
DAG projects tend to operate in a decentralized manner, which reduces the degree of decentralization to improve safety, but at the same time the transaction rate is not close to the theoretical limit.
Using a 40-node network based on VPS (CPU for PoW) to conduct a trading stress test on a representative project IOTA, it can be found that the TPS is very low: the optimal result that can be achieved is 4.19.
After analysis, its performance bottleneck is mainly based on the hardware implementation of the hardware itself.If you use other methods such as FPGA, you should further explore the performance potential of DAG.
At the same time, in order to maintain good transaction processing capabilities, a network of nodes of sufficient scale should be established.
3.DAG Introduction 3.1. Introduction to DAG Principle DAG (Directed Acyclic Graph) is a data structure that represents a directed graph, and in this graph, it cannot return to this point (no loop) from any vertex, as shown in the figure. Shown as follows: 📷 After the DAG technology-based distributed ledger (hereinafter referred to as DAG) technology has been proposed in recent years, many people think that it is hopeful to replace the blockchain technology in the narrow sense. Because the goal of DAG at design time is to preserve the advantages of the blockchain and to improve the shortcomings of the blockchain. Different from the traditional linear blockchain structure, the transaction record of the distributed ledger platform represented by IOTA forms a relational structure with a directed acyclic graph, as shown in the following figure. 📷 3.2. DAG characteristics Due to the different data structure from the previous blockchain, the DAG-based distributed ledger technology has the characteristics of high scalability, high concurrency and is suitable for IoT scenarios. 3.2.1. High scalability, high concurrency The data synchronization mechanism of traditional linear blockchains (such as Ethereum) is synchronous, which may cause network congestion. The DAG network adopts an asynchronous communication mechanism, allowing concurrent writing. Multiple nodes can simultaneously trade at different tempos without having a clear sequence. Therefore, the data of the network may be inconsistent at the same time, but it will eventually be synchronized.
3.2.2. Applicable to IoT scenarios
In the traditional blockchain network, there are many transactions in each block. The miners are packaged and sent uniformly, involving multiple users. In the DAG network, there is no concept of “block”, the smallest unit of the network. It is a "transaction", each new transaction needs to verify the first two transactions, so the DAG network does not need miners to pass the trust, transfer does not require a fee, which makes DAG technology suitable for small payments. 4. Analysis of technical ideas Trilemma, or "trilemma", means that in a particular situation, only two of the three advantageous options can be selected or one of the three adverse choices must be chosen. This type of selection dilemma has related cases in various fields such as religion, law, philosophy, economics, and business management.Blockchain is no exception. The impossible triangle in the blockchain is: Scalability, Decentralization, and Security can only choose two of them. If you analyze DAG technology according to this idea, according to the previous introduction, then DAG has undoubtedly occupied the two aspects of decentralization and scalability. The decentralization and scalability of the DAG can be considered as two-sided, because of the asynchronous accounting features brought about by the DAG data structure, while achieving the high degree of decentralization of the participating network nodes and the scalability of the transaction. 5. There is a problem Since the characteristics of the data structure bring decentralization and scalability at the same time, it is speculated that the security is a hidden danger according to the theory of impossible triangles. But because DAG is a relatively innovative and special structure, can it be more perfect to achieve security? This is not the case from the actual results. 5.1. Double flower problem The characteristics of DAG asynchronous communication make it possible for a double-flower attack. For example, an attacker adds two conflicting transactions (double spending) at two different locations on the network, and the transactions are continuously forward-checked in the network until they appear on the verification path of the same transaction, and the network discovers the conflict. At this time, the common ancestor nodes that the two transactions are gathered together can determine which transaction is a double-flower attack. If the trading path is too short, there will be a problem like "Blowball": when most transactions are "lazy" in extreme cases, only the early trading, the trading network will form a minority. Early transactions are the core central topology. This is not a good thing for DAGs that rely on ever-increasing transactions to increase network reliability. Therefore, at present, for the double flower problem, it is necessary to comprehensively consider the actual situation for design. Different DAG networks have their own solutions. 5.2. Shadow chain problem Due to the potential problem of double flowers, when an attacker can build a sufficient number of transactions, it is possible to fork a fraudulent branch (shadow chain) from the real network data, which contains a double flower transaction, and then this The branch is merged into the DAG network, and in this case it is possible for this branch to replace the original transaction data. 6. Introduction to the current improvement plan At present, the project mainly guarantees safety by sacrificing the native characteristics of some DAGs. The IOTA project uses the Markov chain Monte Carlo (MCMC) approach to solve this problem. The IOTA introduces the concept of Cumulative Weight for transactions to record the number of times the transaction has been cited in order to indicate the importance of its transaction. The MCMC algorithm selects the existing transactions in the current network as a reference for the newly added transactions by weighting the random weights of the accumulated weights. That is, the more referenced the transaction path, the easier it is to be selected by the algorithm. The walk strategy has also been optimized in version 1.5.0 to control the "width" of the transaction topology to a reasonable range, making the network more secure. However, at the beginning of the platform startup, due to the limited number of participating nodes and transactions, it is difficult to prevent a malicious organization from sending a large number of malicious transactions through a large number of nodes to cause the entire network to be attacked by the shadow chain. Therefore, an authoritative arbitration institution is needed to determine the validity of the transaction. In IOTA, this node is a Coordinator, which periodically snapshots the current transaction data network (Tangle); the transactions contained in the snapshot are confirmed as valid transactions. But Coordinator doesn't always exist. As the entire network runs and grows, IOTA will cancel the Coordinator at some point in the future. The Byteball improvement program features its design for the witness and the main chain. Because the structure of DAG brings a lot of transactions with partial order, and to avoid double flowers, it is necessary to establish a full order relationship for these transactions to form a transaction backbone. An earlier transaction on the main chain is considered a valid transaction.Witnesses, who are held by well-known users or institutions, form a main chain by constantly sending transactions to confirm other user transactions. The above scheme may also bring different changes to the platform based on the DAG structure. Taking IOTA as an example, because of the introduction of Coordinator, the decentralization characteristics are reduced to some extent. 7. Actual operation 7.1. Positive effects In addition to solving security problems, the above solutions can also solve the smart contract problem to some extent. Due to the two potential problems caused by the native features of DAG: (1) The transaction duration is uncontrollable. The current mechanism for requesting retransmission requires some complicated timeout mechanism design on the client side, hoping for a simple one-time confirmation mechanism. (2) There is no global sorting mechanism, which results in limited types of operations supported by the system. Therefore, on the distributed ledger platform based on DAG technology, it is difficult to implement Turing's complete intelligent contract system. In order to ensure that the smart contract can run, an organization is needed to do the above work. The current Coordinator or main chain can achieve similar results. 7.2. Negative effects As one of the most intuitive indicators, DAG's TPS should theoretically be unlimited. If the maximum TPS of the IOTA platform is compared to the capacity of a factory, then the daily operation of TPS is the daily production of the plant. For the largest TPS, the April 2017 IOTA stress test showed that the network had transaction processing capabilities of 112 CTPS and 895 TPS. This is the result of a small test network consisting of 250 nodes. For the daily operation of TPS, from the data that is currently publicly available, the average TPS of the main network in the near future is about 8.2, and the CTPS (the number of confirmed transactions per second) is about 2.7. 📷 The average average TPS of the test network is about 4, and the CTPS is about 3. 📷 Data source discord bot: generic-iota-bot#5760 Is this related to the existence of Coordinator? Actual testing is needed to further demonstrate. 8. Measured analysis The operational statistics of the open test network are related to many factors.For further analysis, we continue to use the IOTA platform as an example to build a private test environment for technical measurement analysis. 8.1. Test Architecture The relationship between the components we built this test is shown below. 📷 among them:
In order to avoid the impact of other factors on the main network or test network on the test results, we built a 40-node small private IOTA test network. The build process refers to the "Private IOTA Testnet" project (https://github.com/schierlm/private-iota-testnet.git) and updates the IRI (IOTA Reference Implementation) version used in it to the latest v1.5.0 release. In addition, during the test, the Coordinator simulation tool provided by the tool is used to periodically generate snapshots to confirm the transaction.
Use Python-based open source load testing tool Locust (https://locust.io/) to control the sending of transaction data. After the test is started, the transaction data is randomly sent to the nodes in all private networks.
When the node is started, the "--zmq-enabled" parameter is added to start the ZeroMQ support of the IOTA, and the transaction data obtained by the node is sent to the observing end through the message queue. Use the ZeroMQ event parsing script (https://github.com/lunfardo314/tps\_zmq.git) on the observing side to observe the node transaction data.
8.2. Testing the hardware environment The server uses Amazon AWS EC2 C5.4xlarge: 16 core 3GHz, Intel Xeon Platinum 8124M CPU, 32GB memory, 10Gbps LAN network between servers, communication delay (ping) is less than 1ms, operating system is Ubuntu 16.04. 8.3. Test scenarios and results analysis
8.3.1. Default PoW Difficulty Value
Although there is no concept such as “miners”, the IOTA node still needs to prove the workload before sending the transaction to avoid sending a large number of transactions to flood the network. The Minimum Weight Magnitude is similar to Bitcoin. The result of PoW should be the number of digits of "9", 9 of which is "000" in the ternary used by IOTA. The IOTA difficulty value can be set before the node is started. Currently for the production network, the difficulty value of the IOTA is set to 14; the test network is set to 9. Therefore, we first use the test network's default difficulty value of 9 to test, get the following test results. 📷 Since each IOTA's bundle contains multiple transfers, the actual processed TPS will be higher than the send rate. But by executing the script that parses zmq, it can be observed that the current TPS is very low. Another phenomenon is that the number of requests that can be sent successfully per second is also low. After analysis, the reason is that the test uses VPS, so in PoW, the CPU is mainly used for calculation, so the transaction speed is mainly affected by the transmission speed.
8.3.2. Decrease the PoW difficulty value
Re-test the difficulty value to 1 and get the following results. 📷 As can be seen from the results, TPS will increase after the difficulty is reduced. Therefore, the current TPS of the IOTA project does not reach the bottleneck where the Coordinator is located, but mainly because of the hardware and network of the client itself that sends the transaction. The IOTA community is currently working on the implementation of FPGA-based Curl algorithm and CPU instruction set optimization. Our test results also confirm that we can continue to explore the performance potential of the DAG platform in this way.
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What is Waltonchain?
The Waltonchain Foundation is building a cross-industry, cross-data sharing platform by integrating Blockchain with the Internet of Things through self-developed RFID Chips with intellectual property rights. The in-house developed Waltonchain RFID chips integrate a proprietary, genuine random number generator and an asymmetric encryption logic and hardware signature circuit, all of which are patent-protected. The combination of self-developed RFID chips and the Waltonchain blockchain will ultimately achieve the interconnection of all things and create a genuine, believable, traceable businessmodel with totally shared data and transparent information. Waltonchain will unfold a new era of the Value Internet of Things (VIoT).
The Waltonchain team has formulated a 4-phase development plan, starting from infrastructure platform establishment to gradually incorporating retail, logistics and product manufacturing, and to finally achieving the full coverage of the business ecosystem.
As for the phase 1.0 of the project, the team has developed the clothing system integration scheme based on RFID. The application scenarios at phase 1.0 will establish Golden demonstration template At phase 2.0, our RFID beacon chip will be massproduced and can be used in clothing, B2C retail and logistics. At phase 3.0, manufacturers will achieve traceable customization of intelligent packaging. At the project phase 4.0, with the upgrading and iteration of assets information collection hardware and improvement of blockchain data structure, all assets can be registered in Waltonchain in the future.
Do Sanghyuk (都相爀) – Initiator in Korea Korean, Vice Chairman of the China - Korea Cultural Exchange Development Committee, Director of the Korea Standard Products Association, Chairman of Seongnam Branch of the Korea Small and Medium Enterprises Committee, Chairman of Korea NC Technology Co., Ltd., Senior Reporter of IT TODAY News, Senior Reporter of NEWS PAPER Economic Department, Director of ET NEWS.
Xu Fangcheng (许芳呈) – Initiator in China Chinese, majored in Business Management, former Director for Supply Chain Management of Septwolves Group Ltd., has rich practical experience in supply chain management and purchasing process management. Currently, he is the Director of Shenzhen Silicon, the Director of Xiamen Silicon and the Board Chairman of Quanzhou Silicon. He is also one of our Angel investors.
Kim Suk ki (金锡基) Korean, South Koreas electronics industry leader, Doctor of Engineering (graduated from the University of Minnesota), Professor of Korea University, previously worked at Bell Labs and Honeywell USA, served as vice president of Samsung Electronics, senior expert in integrated circuit design field, IEEE Senior Member, Vice President of the Korea Institute of Electrical Engineers, Chairman of the Korea Semiconductor Industry Association. Has published more than 250 academic papers with more than 60 patents.
Zhu Yanping (朱延平) Taiwanese, China, Doctor of Engineering (graduated from National Cheng Kung University), Chairman of the Taiwan Cloud Services Association, Director of Information Management Department of National Chung Hsing University. Has won the Youth Invention Award by Taiwan Ministry of Education and Taiwan Top Ten Information Talent Award. Has deeply studied blockchain applications over the years and led a block chain technology team to develop systems for health big data and agricultural traceability projects.
Mo Bing (莫冰) Chinese, Doctor of Engineering (graduated from Harbin Institute of Technology), Research Professor of Korea University, Distinguished Fellow of Sun Yat - sen University, Internet of Things expert, integrated circuit expert, Senior Member of Chinese Society of Micro-Nano Technology, IEEE Member. Has published more than 20 papers and applied for 18 invention patents. Began his research of BitCoin in 2013, one of the earliest users of btc 38.com and Korea korbit. Served as Technical Director of Korea University to cooperate with Samsung Group to complete the project Multi sensor data interaction and fusion based on peer to peer network. Committed to the integration of block chain technology and Internet of Things to create a real commercialized public chain.
Wei Songjie (魏松杰) Chinese, Doctor of Engineering (graduated from the University of Delaware), Associate Professor of Nanjing University of Science and Technology, Core Member and Master Supervisor of Network Space Security Engineering Research Institute, Block Chain Technology expert in the field of computer network protocol and application, network and information security. Has published more than 20 papers and applied for 7 invention patents. Previously worked at Google, Qualcomm, Bloomberg and many other high-tech companies in the United States, served as R D engineer and technical expert; has a wealth of experience in computer system design, product development and project management.
Shan Liang (单良) Graduated from KOREATECH (Korea University of Technology and Education) Mechanical Engineering Department, Venture Capital PhD, GM of Waltonchain Technology Co., Ltd. (Korea), Director of Korea Sungkyun Technology Co., Ltd., Chinese Market Manager of the heating component manufacturer NHTECH, a subsidiary of Samsung SDI, economic group leader of the Friendship Association of Chinese Doctoral Students in Korea, one of the earliest users of Korbit, senior digital money player.
Chen Zhangrong (陈樟荣) Chinese, graduated in Business Management, received a BBA degree in Armstrong University in the United States, President of TIANYU INTERNATIONAL GROUP LIMITED, leader of Chinese clothing accessories industry, Chinas well-known business mentor, guest of the CCTV2 Win in China show in 2008. Researcher in the field of thinking training for Practical Business Intelligence e-commerce and MONEYYOU course, expert on success for Profit Model course. Began to contact Bitcoin in 2013 with a strong interest and in-depth study of digital money and decentralized management thinking. Has a wealth of practical experience in the business management, market research, channel construction, business cooperation and business model.
Lin Herui (林和瑞) Chinese, Dean of Xiamen Zhongchuan Internet of Things Industry Research Institute, Chairman of Xiamen Citylink Technology Co., Ltd., Chairman of Xiamen IOT. He successively served as Nokia RD Manager and Product Manager, Microsoft Hardware Department Supply Chain Director. In 2014, started to set up a number of IoT enterprises and laid out the industrial chain of the Internet of Things. The products and services developed under his guidance are very popular. Assisted the government in carrying out industrial and policy research and participated in planning of multiple government projects of smart cities, IoT towns and project reviews.
Ma Xingyi (马兴毅) Chinese, China Scholarship Council (CSC) special student, Doctor of Engineering of Korea University, Research Professor of Fusion Chemical Systems Institute of Korea University, Korea Sungkyun Technology Co., Ltd. CEO, Member of Korea Industry Association, Associate Member of the Royal Society of Chemistry, has published his research results in the worlds top journal Nature Communications and participated in the preparation of a series of teaching materials for Internet of Things engineering titled Introduction to the Internet of Things. His current research direction covers cross-disciplines that combine blockchain technology with intelligent medical technology.
Zhao Haiming (赵海明) Chinese, Doctor of Chemical Conductive Polymer of Sungkyunkwan University, core member of Korea BK21th conductive polymer project, researcher of Korea Gyeonggi Institute of Sensor, researcher of Korea ECO NCTech Co., Ltd., Vice President of the Chinese Chamber of Commerce, Director of Korea Sungkyun Technology Co., Ltd. He has been engaged in transfer of semiconductor, sensor and other technologies in South Korea. He is an early participant of the digital currency market.
Liu Cai (刘才) Chinese, Master of Engineering, has 12 years of experience in design and verification of VLSI and a wealth of practical project experience in RFID chip design process, SOC chip architecture, digital-analog hybrid circuit design, including algorithm design, RTL design, simulation verification, FPGA prototype verification, DC synthesis, backend PR, package testing, etc. Has led a team to complete the development of a variety of navigation and positioning baseband chips and communication baseband chips, finished a series of AES, DES and other encryption module designs, won the first prize of GNSS and LBS Association of China for scientific and technological progress. Finally, he is an expert in the consensus mechanism principle of blockchain and the related asymmetric encryption algorithm.
Yang Feng (杨锋) Chinese, Master of Engineering, worked at ZTE. Artificial intelligence expert, integrated circuit expert. Has 12 years of experience in VLSI research and development, architecture design and verification and 5 years of research experience in artificial intelligence and the genetic algorithm. Has won the Shenzhen Science and Technology Innovation Award. Has done an in-depth research on the principle and realization of the RFID technology, the underlying infrastructure of blockchain, smart contracts and the consensus mechanism algorithm.
Guo Jianping (郭建平) Chinese, Doctor of Engineering (graduated from the Chinese University of Hong Kong), Associate Professor of the Hundred Talents Program of Sun Yat-sen University, academic advisor of masters degree students, IEEE senior member, integrated circuit expert. Has published more than 40 international journal conference papers in the field of IC design and applied for 16 patents in China.
Huang Ruimin (黄锐敏) Chinese, Doctor of Engineering (graduated from the University of Freiburg, Germany), academic advisor of masters degree students, lecturer of the Department of Electronics of Huaqiao University, integrated circuit expert. Mainly explores digital signal processing circuit and system implementation and works on digital signal processing technology long-term research and development.
Guo Rongxin (郭荣新) Chinese, Master of Engineering, Deputy Director of the Communication Technology Research Center of Huaqiao University. Has more than 10 years of experience in design and development of hardware and software for embedded systems, works on the long-term research and development of RFID and blockchain technology in the field of Internet of Things.
Dai Minhua (戴闽华) Chinese, graduated in Business Management, received a BBA degree from Armstrong University, senior financial expert, served as Vice President and CFO of Tanyu International Group Co., Ltd. Has 13 years of financial work experience, has a wealth of experience in developing and implementing enterprise strategy and business plans, as well as achieving business management objectives and development goals.
Liu Dongxin (刘东欣) Chinese, received an MBA from China Europe International Business School, Visiting Scholar of Kellogg School of Management at Northwestern University, strategic management consulting expert, investment and financing expert. His current research interest lies in the impact of the blockchain technology on the financial sector.
Song Guoping (宋国平) Qiu Jun (邱俊) Yan Xiaoqian (严小铅) Lin Jingwei (林敬伟) He Honglian (何红连)
Ko Sang Tae (高尚台) Liu Xiaowei (刘晓为) Su Yan (苏岩) Zhang Yan (张岩) Ma Pingping (马萍萍) Peng Xiande (彭先德) Fu Ke (傅克) Xiao Guangjian (肖光坚) Li Xiong (李雄)
QuarkChain Testnet 1.0 was built based on standardized blockchain system requirements, which included network, wallet, browser, and virtual machine functionalities. Other than the fact that the token was a test currency, the environment was completely compatible with the main network. By enhancing the communication efficiency and security of the network, Testnet 2.0 further improves the openness of the network. In addition, Testnet 2.0 will allow community members (other than citizens or residents of the United States) to contribute directly to the network, i.e. running a full node and mining, and receive testnet tokens as rewards. QuarkChain Testnet 2.0 will support multiple mining algorithms, including two typical algorithms: Ethash and Double SHA256, as well as QuarkChain’s unique algorithm called Qkchash – a customized ASIC-resistant, CPU mining algorithm, exclusively developed by QuarkChain. Mining is available both on the root chain and on shards due to QuarkChain’s two-layered blockchain structure. Miners can flexibly choose to mine on the root chain with higher computing power requirements or on shards based on their own computing power levels. Our Goal By allowing community members to participate in mining on Testnet 2.0, our goal is to enhance QuarkChain’s community consensus, encourage community members to participate in testing and building the QuarkChain network, and gain first-hand experience of QuarkChain’s high flexibility and usability. During this time, we hope that the community can develop a better understanding about our mining algorithms, sharding technologies, and governance structures, etc. Furthermore, this will be a more thorough challenge to QuarkChain’s design before the launch of mainnet! Thus, we sincerely invite you to join the Testnet 2.0 mining event and build QuarkChain’s infrastructure together! Today, we’re pleased to announce that we are officially providing the CPU mining demo to the public (other than citizens and residents of the United States)! Everyone can participate in our mining event, and earn tQKC, which can be exchanged to real rewards by non-U.S. persons after the launch of our mainnet. Also, we expect to upgrade our testnet over time, and expect to allow GPU mining for Ethash, and ASIC mining for Double SHA256 in the future. In addition, in the near future, a mining pool that is compatible with all mining algorithms of QuarkChain is also expected to be supported. We hope all the community members can join in with us, and work together to complete this milestone! 2 Introduction to Mining Algorithms 2.1 What is mining？ Mining is the process of generating the new blocks, in which the records of current transactions are added to the record of past transactions. Miners use software that contribute their mining power to participate in the maintenance of a blockchain. In return, they obtain a certain amount of QKC per block, which is called coinbase reward. Like many other blockchain technologies, QuarkChain adopts the most widely used Proof of Work (PoW) consensus algorithm to secure the network. A cryptographically-secure PoW is a costly and time-consuming process which is difficult to solve due to computation-intensity or memory intensity but easy for others to verify. For a block to be valid it must satisfy certain requirements and hash to a value less than the current target threshold. Reverting a block requires recreating all successor blocks and redoing the work they contain, which is costly. By running a cluster, everyone can become a miner and participate in the mining process. The mining rewards are proportional to the number of blocks mined by each individual. 2.2 Introduction to QuarkChain Algorithms and Mining setup According to QuarkChain’s two-layered blockchain structure and Boson consensus, different shards can apply different consensus and mining algorithms. As part of the Boson consensus, each shard can adjust the difficulty dynamically to increase or decrease the hash power of each shard chain. In order to fully test QuarkChain testnet 2.0, we adopt three different types of mining algorithms” Ethash, Double SHA256, and Qkchash, which is ASIC resistant and exclusively developed by QuarkChain founder Qi Zhou. These first two hash algorithms correspond to the mining algorithms dominantly conducted on the graphics processing unit (GPU) and application-specific integrated circuits (ASIC), respectively. I. Ethash Ethash is the PoW mining algorithm for Ethereum. It is the latest version of earlier Dagger-Hashimoto. Ethash is memory intensive, which makes it require large amounts of memory space in the process of mining. The efficiency of mining is basically independent of the CPU, but directly related to memory size and bandwidth. Therefore, by design, building Ethash ASIC is relatively difficult. Currently, the Ethash mining is dominantly conducted on the GPU machines. Read more about Ethash: https://github.com/ethereum/wiki/wiki/Ethash II. Double SHA256 Double SHA256 is the PoW mining algorithms for Bitcoin. It is computational intensive hash algorithm, which uses two SHA256 iterations for the block header. If the hash result is less than the specific target, the mining is successful. ASIC machine has been developed by Bitmain to find more hashes with less electrical power usage. Read more about Double SHA256: https://en.bitcoin.it/wiki/Block_hashing_algorithm III. Qkchash Originally, Bitcoin mining was conducted on the CPU of individual computers, with more cores and greater speed resulting in more profitability. After that, the mining process became dominated by GPU machines, then field-programmable gate arrays (FPGA) and finally ASIC, in a race to achieve more hash rates with less electrical power usage. Due to this arms race, it has become increasingly harder for prospective new miners to join. This raises centralization concerns because the manufacturers of the high-performance ASIC are concentrated in a small few. To solve this, after extensive research and development, QuarkChain founder Dr. Qi Zhou has developed mining algorithm — Qkchash, that is expected to be ASIC-resistant. The idea is motivated by the famous date structure orders-statistic tree. Based on this data structure, Qkchash requires to perform multiple search, insert, and delete operations in the tree, which tries to break the ASIC pipeline and makes the code execution path to be data-dependent and unpredictable besides random memory-access patterns. Thus, the mining efficiency is closely related to the CPU, which ensures the security of Boston consensus and encourges the mining decentralization. Please refer to Dr. Qi’s paper for more details: https://medium.com/quarkchain-official/order-statistics-based-hash-algorithm-e40f108563c4 2.3 Testnet 2.0 mining configuration Numbers of Shards: 8 Cluster: According to the real-time online mining node The corresponding mining algorithm is Read more about Ethash with Guardian: https://github.com/QuarkChain/pyquarkchain/wiki/Ethash-with-Guardian) We will provide cluster software and the demo implementation of CPU mining to the public. Miners are able to arbitrarily select one shard or multiple shards to mine according to the mining difficulty and rewards of different shards. GPU / ASIC mining is allowed if the public manages to get it working with the current testnet. With the upgrade of our testnet, we will further provide the corresponding GPU / ASIC software. QuarkChain’s two-layered blockchain structure, new P2P mode, and Boson consensus algorithm are expected tobe fully tested and verified in the QuarkChain testnet 2.0. 3 Mining Guidance In order to encourage all community members to participate in QuarkChain Testnet 2.0 mining event, we have prepared three mining guidances for community members of different backgrounds. Today we are releasing the Docker Mining Tutorial first. This tutorial provides a command line configuration guide for developers and a docker image for multiple platforms, including a concise introduction of nodes and mining settings. Follow the instructions here: Quick Start with QuarkChain Mining. Next we will continue to release: A tutorial for community members who don’t have programming background. In this tutorial, we will teach how to create private QuarkChain nodes using AWS, and how to mine QKC step by step. This tutorial is expected to be released in the next few days. Programs and APIs integrated with GPU / ASIC mining. This is expected to allow existing miners to switch to QKC mining more seamlessly. Frequently Asked Questions: 1. Can I use my laptop or personal computer to mine? Yes, we will provide cluster software and the demo implementation of CPU mining to the public. Miners will be able to arbitrarily select one shard or multiple shards to mine according to the work difficulty and rewards of different shards. 2. What is the minimum requirements for my laptop or personal computer to mine? Please prepare a Linux or MacOs machine with public IP address or port forwarding set up. 3. Can I mine with my GPU or an ASIC machine? For now, we will only be providing the demo implementation of CPU mining as our first step. Interested miners/developers can rewrite the corresponding GPU / ASIC mining program, according to the JSON RPC API we provided. With the upgrade of our testnet, we expect to provide the corresponding GPU / ASIC interface at a later date. 4. What is the difference among the different mining algorithms? Which one should I choose? Double SHA256 is a computational intensive algorithm, but Ethash and Qkchash are memory intensive algorithms, which have certain requirements on the computer’s memory. Since currently we only support CPU mining, the mining efficiency entirely depends on the cores and speed of CPU. 5. For testnet mining, what else should I know? First, the mining process will occupy a computer’s memory. Thus, it is recommended to use an idle computer for mining. In Testnet 2.0 settings, the target block time of root chain is 60 seconds, and the target block time of shard chain is 10 seconds. The mining is a completely random process, which will take some time and consume a certain amount of electricity. 6. What are the risks of testnet mining? Currently our testnet is still under the development stage and may not be 100% stable. Thus, there would be some risks for QuarkChain main chain forks in testnet, software upgrades and system reboots. These may cause your tQKC or block record to be lost despite our best efforts to ensure the stability and security of the testnet. For more technical questions, welcome to join our developer community on Discard: https://discord.me/quarkchain. 4 Reward Mechanism Testnet 2.0 and all rewards described herein, including mining, are not being offered and will not be available to any citizens or residents of the United States and certain other jurisdictions. All rewards will only be payable following the mainnet launch of QuarkChain. In order to claim or receive any of the following rewards after mainnet launch, you will be required to provide certain identifying documentation and information about yourself. Failure to provide such information or demonstrate compliance with the restrictions herein may result in forfeiture of all rewards, prohibition from participating in future QuarkChain programs, and other sanctions. NO U.S. PERSONS MAY PARTICIPATE IN TESTNET 2.0 AND QUARKCHAIN WILL STRICTLY ENFORCE THIS VIA OUR KYC PROCEDURES. IF YOU ARE A CITIZEN OR RESIDENT OF THE UNITED STATES, DO NOT PARTICIPATE IN TESTNET 2.0. YOU WILL NOT RECEIVE ANY REWARDS FOR YOUR PARTICIPATION. 4.1 Mining Rewards
Prize Pool A total of 5 million QKC prize pool have been reserved to motivate all miners to participate in the testnet 2.0 mining event. According to the different mining algorithms, the prize pool is allocated as follows:
Total Prize Pool: 5,000,000 QKC Prize Pool for Ethash Algorithm: 2,000,000 QKC Prize Pool for Double SHA256 Algorithm: 1,000,000 QKC Prize Pool for Qkchash Algorithm: 2,000,000 QKC The number of QKC each miner is eligible to receive upon mainnet launch will be calculated on a pro rata basis for each mining algorithm set forth above, based on the ratio of sharded block mined by each miner to the total number of sharded block mined by all miners employing such mining algorithm in Testnet 2.0.
Early-bird Rewards To encourage more people to participate early, we will provide early bird rewards. Miners who participate in the first month (December 2018, PST) will enjoy double points. This additional point reward will be ended on December 31, 2018, 11:59pm (PST).
4.2 Bonus for Bug Submission: If you find any bugs for QuarkChain testnet, please feel free to create an issue on our Github page: https://github.com/QuarkChain/pyquarkchain/issues, or send us an email to [email protected]. We may provide related rewards based on the importance and difficulty of the bugs. 4.3 Reward Rules: QuarkChain reserves the right to review the qualifications of the participants in this event. If any cheating behaviors were to be found, the participant will be immediately disqualified from any rewards. QuarkChain further reserves the right to update the rules of the event, to stop the event/network, or to restart the event/network in its sole discretion, including the right to interpret any rules, terms or conditions. For the latest information, please visit our official website or follow us on Telegram/Twitter. About QuarkChain QuarkChain is a flexible, scalable, and user-oriented blockchain infrastructure by applying blockchain sharding technology. It is one of the first public chains that successfully implemented state sharding technology for blockchain in the world. QuarkChain aims to deliver 100,000+ on-chain TPS. Currently, 14,000+ peak TPS has already been achieved by an early stage testnet. QuarkChain already has over 50 partners in its ecosystem. With flexibility, scalability, and usability, QuarkChain is enabling EVERYONE to enjoy blockchain technology at ANYTIME and ANYWHERE. Testnet 2.0 and all rewards described herein are not being and will not be offered in the United States or to any U.S. persons (as defined in Regulation S promulgated under the U.S. Securities Act of 1933, as amended) or any citizens or residents of countries subject to sanctions including the Balkans, Belarus, Burma, Cote D’Ivoire, Cuba, Democratic Republic of Congo, Iran, Iraq, Liberia, North Korea, Sudan, Syria, Zimbabwe, Central African Republic, Crimea, Lebanon, Libya, Somalia, South Suda, Venezuela and Yemen. QuarkChain reserves the right to terminate, suspend or prohibit participation of any user in Testnet 2.0 at any time. In order to claim or receive any rewards, including mining rewards, you will be required to provide certain identifying documentation and information. Failure to provide such information or demonstrate compliance with the restrictions herein may result in termination of your participation, forfeiture of all rewards, prohibition from participating in future QuarkChain programs, and other actions. This announcement is provided for informational purposes only and does not guarantee anyone a right to participate in or receive any rewards in connection with Testnet 2.0. Note: The use of Testnet 2.0 is subject to our terms and conditions available at: https://quarkchain.io/testnet-2-0-terms-and-conditions/ more about qurakchain: Website: https://quarkchain.io/cn/ Facebook: https://www.facebook.com/quarkchainofficial/ Twitter: https://twitter.com/Quark_Chain Telegram: https://t.me/quarkchainio
There's no point regretting anything because you cannot undo the past. I heard about Snowden in prison, came on the news but I only know what the news has been telling me. I will look more in to it, he's got balls I can tell you that and I admire a good set of balls.
You don't learn how to program, you learn how use a programming language, programming is what you do with that information. Read lots of examples of source code, see if you can work out whats going on. Don't just copy/paste the examples, write them word for word no matter how long they are. Not only will it help understand what it is doing better you may also learn a few tricks.
Basically it prevents me from using encryption that allows hidden volumes, virtual machines and I cannot delete my internet history. It lasts for 5 years and each breach of the order can be punishable up to 5 years.
It's not a case of them being fair or unfair. I can't go too in to detail about it if I want to take it back to court, I just want to challenge it, plus I like to keep my cards close to my chest.
There's some funny characters in prison I can tell you that, made friends for life. Most of the people in there were in there for fraud, drugs, gang stuff. I never met any famous prisoners if that's what you mean? Then again everyone's story in prison is interesting.
Strong encryption, limit the amount of personal information you place on the internet, don't draw attention, only use a sandboxed browser and tunnel your HTTPS through SSH using the highest of encryption, PGP mail for every mail, don't store encryption keys on your computer, full disk encryption and/or hidden OS, use different emails for your banking, paypal etc, Mak3p4$5w0rdZ!nCr3d!b4LlYsTr0nG, uninstall flash use Link to youtube.com instead etc, etc...
Security isn't something you can just apply it's an on going process and in most cases you are relying on products sold to you on a trust basis. You're told that Antivirus software will stop you getting a virus but what you're not told is that Antivirus software only protects you against what is known, takes less than an hour to write a new piece of malware or backdoor that your AV will never detect.
People put too much faith in to security systems without understanding how they work, their capabilities or limitations.
There's no need to be "pentested" it's a right con, they only test you against old exploits, if you update regular then you're already safe.
Use 2 factor authentication and/or strong password policy, prevent users creating the own password (they will only make them simpler)
Just make your data worthless to a hacker by encrypting it.
Nothing is worth going to prison for. Yeah they are happy I am back and I am happy to see them again. It was ~100GBP for my parents to come and visit me in prison, I was a long way from home. I told them not to waste their money because the visit only lasts 2 hours.
I am x military I am used to being away from home for long periods of time. It also makes time fly faster when you're not constantly reminded about home. If you don't know what you are missing then you don't miss much.
Sometimes, events like that helps to put things in to perspective. We often don't think about our lives on a day to day basis but when something out of the "norm" happens it makes us think that little more.
I think it's great, scrypt coin too! I think they will get heavily regulated soon though. I had 78 bitcoins backed up on a SDHC before I was sent to prison. Back then they were worth ~$40 each. Come out of jail and I can't find that shit anywhere lol.
The only problem is even if I do find it, it's encrypted with keys that are on the computer the police confiscated and I can't get back.
I wonder how long it will last here in the west, I'm surprised it hasn't already been regulated the tax man must be pissed!
I think there are also more constructive uses for mining, I mentioned this on twitter also. See there are a lot of cancer researchers and scientists that have HUGE amounts of data that needs to be mined to help cure diseases and solve the worlds problems.
The world hash rate for crypto coins is more powerful than most of the worlds super computers combined. Cancer researchers should give coins for mining cancer research data instead of wasting time generating meaningless hashes.
Honestly, no Idea there is too much internet rumor and no one has officially come forward to claim it. I read some people in Spain were arrested and questioned in relation to the PSN breach but that still doesn't mean it was them.
Maintaining a strong persona such as kayla and doing what I did wasn't easy. If I could go back in time I wouldn't change anything, I'd just keep going back in time to relive it over and over again. Nothing is worth prison time, it's a waste of life however I did manage to get some qualifications out of it. Not many people can say they left prison with a diploma for the thing they went in for.
I honestly believe they are state sponsored (possibly not from the beginning) but I do believe they are the people Assad is turning to. As for their methods I don't even know what methods they are using, I'll read in to it though, I'm fresh out of prison and most of what they have done was done while I had no internet access. I've been banned from the internet since 2011.
I was able to use computers in prison. I was given a job as a class room assistant helping teach people about computers, basic things. I also managed to complete a number of computer related qualifications and gained a diploma. Seeing the internet after 2+ years was kind of strange though. The internet looks a lot different now compared to how it did in 2011. To be honest I don't like it, it has that "iphone look" to it all, big buttons and lots of unneeded JS. I wish I could build a rig I just do not have the money to do so. Hopefully soon I will find a nice job and maybe then I will build one.
Once I got to prison I realized it's nothing like the movies. Because it was all over the news when I was sentenced everyone in the jail knew who I was and what I was in for. I've made some good friends out it, people I am going to meet again once they are free. No one was ever violent towards me, you don't give any attitude you don't get any attitude. I did see some people get fucked up in there, mostly starts over something really silly, like a game of pool.
Well, most of the prison movies I have seen all show people stood at the bars, big guys growling "mmm fresh meat" and everyone getting stabbed up every 2 minuets. When you've never been to prison before you can't help but think back to every movie you've seen about prison.
Out of everyone I have met there are only a small handful of people that I would put in to the "reverse engineehacker" bracket. Lots of people who know how to use exploits, not many who know how and why they work or are able to write their own, truly is a dieing art.
Programming languages too, learning new things is never easy, it's about determination and the will to succeed. The best way to learn is to read lots of source code and try to work out what is going on, maybe you could even improve on it?
I just learned from doing, trial and error. If there was something that I did not understand I would just research it, it sometimes helps to read it from more than one source. I used to just read lots of examples and try to make sense of them, if I found something new or something I did not understand I would research it.
As for time, I am unsure... I am still learning now, it is an on going process. All I can say is learn the basics and be creative, if there's something you do not understand research it, google always has the answer.
BTCMiner - Bitcoin Miner for ZTEX FPGA Boards. BTCMiner is an Open Source Bitcoin Miner for ZTEX USB-FPGA-Modules 1.15b and 1.15d and USB-FPGA-Modules 1.15x.The latter variant is optimized for cryptographic computations such as Bitcoin Mining and allows to build up FPGA clusters using standard components (USB cables and USB hubs). FPGA.guide - hardwares, softwares, downloads, tools, and guides/tutorials for FPGA Cryptocurrency Mining. Check out the available FPGA mining card/board here! Subscribe to get Updates. Field programmable gate array (FPGA) is an integrated circuit designed to be configured by the customer or designer after manufacturing—hence "field-programmable".FPGAs are integrated circuits that can be tailored to suit a particular task like mining bitcoins, after their manufacturing thus creating ASIC. I found that in my university there are some FPGA's available to test and to play with. I am a software/web programmer and I have never been working with verilog or whatever is used to program FPGA. So is there a nice tutorial which explains how to start mining using FPGA. I do not want to create a fancy 2 - 10 connected FPGAs to run mine for ... This tutorial is intended for the AGPF SK1 FPGA Miner which is a FPGA miner. The FPGA miner AGPF SK1 has a current firmware of 0.1.5 and supports mining of various algorithms such as Veo, Skunk and xdag. Subsequent firmware upgrades will support verus and vbk algorithms as well as other algorithms. Currently, all cryptocurrencies based on Veo, Skunk and xdag algorithms can be mined, such as ...
Using FPGA to mine on Auto Exchange Pools for Bitcoin
Cryptocurrency Mining Software Tutorial Series 5: Cudaminer on Nvidia Jetson Tx2 (Special Edition) - Duration: 6 ... ELE 432- FPGA Bitcoin Miner - Duration: 4:08. Burak 14,597 views. 4:08 . Tiny ... This is the video showing the final project of EC551 in Spring semester,2015. This project, Bitcoin mining, is done by group "Bitminers". The group members a... This video shows how to use your Hashaltcoin.com Blackminer f1 mini to mine on auto exchange pools for Bitcoin. I decided to mine Phi2 algo on a pool that sells the coins for Bitcoin, using pools ... Bitcoin mining 2 x DE2-115 Altera FPGA using slush pool mining proxy - Duration: 0:19. ... Ben Heck's FPGA Dev Board Tutorial - Duration: 24:52. element14 presents 182,470 views. 24:52 . Pimp My ... ELE 432- FPGA Bitcoin Miner Burak. Loading... Unsubscribe from Burak? ... Ben Heck's FPGA Dev Board Tutorial - Duration: 24:52. element14 presents 186,112 views. 24:52. 8X Tesla V100 WORLD RECORD ...