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BLOCKCHAIN TECHNOLOGIES THAT WORK

About HashCoins

Why professionals choose us

The main concentrate area of our company is the development of cryptographic hardware, creation of blockchain technology-based solutions and provision of remote hardware access services. The development of thesis prospects is supported by company’s own captial spil well spil investors’ funds.

Experienced

HashCoins has began its operations ter the beginning of the cryptotechnology era te 2013.

Professional

HashCoins team consists of top level specialists with many years of practice te various global projects.

Trustworthy

Overheen 400 000 private customers and 60 companies work with our solutions on a daily poot.

Blockchain-based product development

For corporate and governmental needs

Blockchain is a decentralized public registry that permits creating unique software products. Our company develops registries of proprietary rights, asset trading systems, access control and gegevens verification solutions.

Our specialists are ready to adapt a large spectrum of unique technologies for the needs of your company and create the finished product that will fulfil even the highest quality and security requirements.

Mining equipment

Transaction processing hardware systems

HashCoins develops hardware to process transactions of cryptocurrencies based on SHA-256, Scrypt and X11 algorithms. The hardware may be used for Bitcoin, Litecoin and any other listed algorithm-based cryptocurrency mining or for private blockchain sustaining.

Our equipment comes together with specialized software. Our products are subject to extensive testing to ensure the quality and stability of mining processes.

Investment solutions ter cryptotechnology

For large investors and private customers

HashCoins offerande its clients a range of different investment options which differ by profitability and risks.

Our investment options include: construction of voortdurend facilities (transaction processing centers), development of ASIC chips, cryptohardware and blockchain-based systems spil well spil cryptocurrency mining.

Testimonials

Words from our vrouwen

CryptoPay

HashCoins is one of our oldest playmates and clients.

The company has a solid reputation and wasgoed one of the very first on the market. While many mining companies rise and fall, they keep growing ter a sustainable manner.

George Basiladze, CryptoPay CEO

EmerCoin

HashCoins wasgoed the very first company, that not only has seen the advantages of blockchain-based authorization control system (emcSSH and emcSSL) but also has implemented it on all its services, datacenters and own mining equipment. During the implementation, an ultra-light version of Emercoin wallet wasgoed created. It is possible to install on embedded computers, such spil Raspberry Pi.

HashCoins are our fucking partners for a long time. They have expertise ter blockchain technologies and understand where and how they can be implemented spil well spil how existing processes can be optimized using the blockchain.

– Jevgeni Shumilov, Emercoin CEO

AdVendor

Wij have commenced our cooperation with HashCoins ter early 2016. Their main advantage is professionalism and deep understanding of the market and their services.

Together wij have designed and launched a vast number of campaigns, greatly improving their traffic.

Ter cryptography, scrypt (pronounced “ess crypt” [1] ) is a password-based key derivation function created by Colin Percival, originally for the Tarsnap online backup service. [Two] The algorithm wasgoed specifically designed to make it costly to perform large-scale custom-built hardware attacks by requiring large amounts of memory. Ter 2016, the scrypt algorithm wasgoed published by IETF spil RFC 7914. A simplified version of scrypt is used spil a proof-of-work scheme by a number of cryptocurrencies, very first implemented by an anonymous programmer called ArtForz ter Tenebrix and followed by Fairbrix and Litecoin soon after. [Trio]

Contents

A password-based key derivation function (password-based KDF) is generally designed to be computationally intensive, so that it takes a relatively long time to compute (say on the order of several hundred milliseconds). Legitimate users only need to perform the function once vanaf operation (e.g., authentication), and so the time required is negligible. However, a brute-force attack would likely need to perform the operation billions of times, at which point the time requirements become significant and, ideally, prohibitive.

Previous password-based KDFs (such spil the popular PBKDF2 from RSA Laboratories) have relatively low resource requests, meaning they do not require elaborate hardware or very much memory to perform. They are therefore lightly and cheaply implemented te hardware (for example on an ASIC or even an FPGA). This permits an attacker with sufficient resources to launch a large-scale parallel attack by building hundreds or even thousands of implementations of the algorithm te hardware and having each search a different subset of the key space. This divides the amount of time needed to finish a brute-force attack by the number of implementations available, very possibly bringing it down to a reasonable time framework.

The scrypt function is designed to last such attempts by raising the resource requests of the algorithm. Specifically, the algorithm is designed to use a large amount of memory compared to other password-based KDFs, [Four] making the size and the cost of a hardware implementation much more expensive, and therefore limiting the amount of parallelism an attacker can use, for a given amount of financial resources.

The large memory requirements of scrypt come from a large vector of pseudorandom bit strings that are generated spil part of the algorithm. Once the vector is generated, the elements of it are accessed te a pseudo-random order and combined to produce the derived key. A straightforward implementation would need to keep the entire vector ter RAM so that it can be accessed spil needed.

Because the elements of the vector are generated algorithmically, each factor could be generated on the fly spil needed, only storing one factor ter memory at a time and therefore cutting the memory requirements significantly. However, the generation of each factor is intended to be computationally expensive, and the elements are expected to be accessed many times via the execution of the function. Thus there is a significant trade-off ter speed te order to get rid of the large memory requirements.

This sort of time–memory trade-off often exists ter laptop algorithms: speed can be enlargened at the cost of using more memory, or memory requirements decreased at the cost of performing more operations and taking longer. The idea behind scrypt is to deliberately make this trade-off costly te either direction. Thus an attacker could use an implementation that doesn’t require many resources (and can therefore be massively parallelized with limited expense) but runs very leisurely, or use an implementation that runs more quickly but has very large memory requirements and is therefore more expensive to parallelize.

The algorithm includes the following parameters:

  • Passphrase – The string of characters to be hashed.
  • Salt – A string of characters that modifies the hash to protect against Rainbow table attacks
  • N – CPU/memory cost parameter.
  • p – Parallelization parameter, a positive rechtschapen satisfying p ≤ (Two 32 − 1) * hLen / MFLen.
  • dkLen – Intended output length ter octets of the derived key, a positive oprecht satisfying dkLen ≤ (Two 32 − 1) * hLen.
  • r – The blocksize parameter, which fine-tunes sequential memory read size and voorstelling. 8 is commonly used.
  • hLen – The length te octets of the hash function (32 for SHA256).
  • MFlen – The length te octets of the output of the mixing function (SMix below). Defined spil r * 128 ter RFC7914.

Where Integerify is a bijective function from <0, 1>k to <0. Two k − 1>.

Where Salsa20/8 is the 8-round version of Salsa20.

Scrypt is used ter many cryptocurrencies spil a proof-of-work algorithm. It wasgoed very first implemented for Tenebrix (released ter September 2011) and served spil the fundament for Litecoin and Dogecoin, which also adopted its scrypt algorithm. [Five] [6] Mining of cryptocurrencies that use scrypt is often performed on graphics processing units (GPUs) since GPUs tend to have significantly more processing power compared to the CPU. [7] This led to shortages of high end GPUs due to the rising price of thesis currencies ter the months of November and December 2013. [8]

Spil of May 2014, specialized ASIC mining hardware is available for scrypt-based cryptocurrencies. [9] Spil of 2016, InnoSilicon claims to have 14 nm technology with an efficiency of 1.Five watts/megahash-second. [Ten]

Te 2013 a Password Hashing Competition wasgoed held to develop an improved key derivation function.

Related movie: How to BitCoin mine using quick ASIC mining hardware



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