· · · · · · · · · · · ethOS is a 64-bit linux OS that mines Ethereum, Zcash, Monero, and other GPU-minable coins.Altcoins can be autotraded to Bitcoin.Please see the ethOS knowledge base for documentation and answers to common questions.There are 15,417 total ethOS rigs currently mining.ethOS was released February 15 2016.All proceeds from ethOS sales are distributed among the development team.The following features are possible on ethOS, but must be done without the support of ethOS developers or staff.Performing the below actions should be done at your own risk.There is no email or skype support for ethOS.Please see the "Getting Support" section of the ethOS knowledge base.ethOS is released under the "Small Goat with Red Eyes" license. per each rig on which you intend to run ethOS.If you don't, a small goat with red eyes will visit you while you sleep.ethOS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

ethOS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.litecoin buy canadaSee the GNU General Public License for more details.litecoin exchange rate usdYou should have received a copy of the GNU General Public License along with ethOS.bitcoin wallet sign up bonusI've seen a lot of people expressing concern that Bitcoin mining ASICs are going to lead to some sort of password cracking apocalypse.kurs bitcoin litecoinAn "Application Specific Integrated Circuit" (ASIC) is a chip that is designed to do one thing quickly and efficiently.bitcoin stolen from wallet

Think of it as a single program that has been made into a hardware and cannot be changed once manufactured.In this case the "Application" is Bitcoin mining, at the heart of which is a hash algorithm called "double SHA256" (DSHA256).linux bitcoin miner gpuThere are many password hashing schemes in use, but only two well known schemes can benefit from a fast DSHA256 engine - "salted SHA256" (SSHA256) and plain SHA256.bitcoin ghs priceNeither of these schemes is particularly common.bitcoin cheat engineThe general operation of a password cracker is pretty simple: Load the password hashes into memory.bitcoin wallet high cpuGenerate a candidate password.Hash the candidate password.

Check the hash against those in memory.Repeat steps 2-4 over and over as fast as possible, outputting results as they are found.For a moment, let's assume that Bitcoin mining ASICs just takes in a block of data and returns its DSHA256 hash.For SHA256 and SSHA256 hashes, using the DSHA256 engine is fairly straightforward, use a CPU or GPU to compute the SHA256 of each hash (since DSHA256(password) = SHA256(SHA256(password))) then follow the plan above.To simplify things, we'll round the time the ASIC takes to hash data down to zero.Under this simplification, where is the process still slow?Referring back to our model of a password cracker, we see some steps that must be performed for each hash which are not handled by the ASIC, specifically steps 2 and 4.The CPU is going to need to get involved here - if a quad core CPU clocked at 3.0GHz took one cycle (in reality it will be thousands) to generate each candidate password and another cycle to check the hash, we'd be operating at 6 billion passwords per second.

Sounds great, but a high end GPU running oclHashcat can try about 1 billion passwords per second.Our infinitely fast ASIC is only giving us a factor of six speedup vs a GPU!Unfortunately a few steps were left out of the our password cracker model, and there are other bottlenecks to contend with even though our CPU and ASIC are awesome.Adding in the missing steps, we have this model: Load the password hashes into memory.Transfer the candidate password to the ASIC.Transfer the hash back from the ASIC.Repeat steps 2-6 over and over as fast as possible until you have enough results.It turns out that steps 3 and 5 are slow.ASICs are usually connected to a computer via a USB interface that emulates a serial port for easy interfacing.These usually operate at speeds of around 115.2 Kbps, but what if we had the full 480 Mbps of USB 2.0?Assume each password is 8 bytes and each hash is 32 bytes.USB 2.0 is a half duplex protocol, so we have 40 bytes that need to be transferred for each password.

480 Mbps is 480 million bits per second or 60 million bytes per second, divided by 40 bytes gives us an upper bound of 1.5 million passwords per second.The limited speed at which we can get passwords to the ASIC means that GPUs will run circles around it.This probably leaves you wondering how ASICs can do tens or hundreds of billions of hashes per second given the limited bandwidth.The answer is fairly simple - they do more than just "data in, hash out".A Bitcoin block header contains the following data: Field Size Notes version 4B Currently always 1 hashPrevBlock 32B DSHA256 of previous block hashMerkleRoot 32B DSHA256 of all hashes related to this block timestamp 4B Seconds since Midnight of January 1st, 1970 bits 4B Compact representation of current difficulty nonce 4B Chosen to make the hash of the block headers less than the current target value We send the ASIC the version, hashPrevBlock, hashMerkleRoot, bits, range of timestamps (they do not have to be exactly correct) along with a difficulty target (in a pool an easier "share target" is used to prove the miner is doing work).