Jun 24, 2020 · What is a Bitcoin hash and SHA-256. SHA-256 is a secure encryption algorithm that has gained popularity due to the Bitcoin code. The abbreviation SHA is the Secure Hash Algorithm, and 256 means that the cryptocurrency algorithm generates a 256-bit hash, i.e., a string of 256 bits.

Oct 29, 2018 · When it came to integrating a hashing algorithm into blockchain protocols, Bitcoin used SHA256, while Ethereum used a modified variant of SHA-3 (KECCAK256) for its proof of work algorithm. Bitcoin SHA256 implementation can be computed with great efficiency by using Application Specific Integrated Circuits (or ASICs). Secure Hash Algorithm 1: The Secure Hash Algorithm 1 (SHA-1) is a cryptographic computer security algorithm. It was created by the US National Security Agency in 1995, after the SHA-0 algorithm in 1993, and it is part of the Digital Signature Algorithm or the Digital Signature Standard (DSS). explained as follows; (i) The achieved results show a significant improvement on the performance of the SHA-256 algorithm compared to similar previously proposed approaches, obtaining a SHA-256 Algorithm //Initialize table of round constants: // First 32 bits of the fractional part of the cube // roots of the first 64 primes K 1 – K 64 = 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, Apr 11, 2017 · Secure Hashing Algorithm (SHA1) explained. Dr Mike Pound explains how files are used to generate seemingly random hash strings. EXTRA BITS: https://youtu.be/ SHA-1 is another popular hashing algorithm that was determined in 2005 to be too weak for continued use. By 2010, U.S. government agencies were required to replace SHA-1 with SHA-2. SHA-2 is a family of hashing algorithms including SHA-224, SHA-256, SHA-384, SHA-512, SHA-512/224, and SHA-512/256. These are all considered reliable for ongoing use.

## Due to the exposed vulnerabilities of SHA-1, cryptographers modified the algorithm to produce SHA-2, which consists of not one but two hash functions known as SHA-256 and SHA-512, using 32- and 64-bit words, respectively.

Given NSA's hacking abilities, can the SHA256 algorithm

### In this article, we are going to describe the SHA-2 and MD5 algorithms. Both of these hash functions are widely used in modern computer systems. The SHA-2 algorithm is used for cryptographic applications such as password storage and as a proof-of-work for the Bitcoin cryptocurrency. The MD5 algorithm is a much faster hashing algorithm but it is not cryptographically secure. Its main application is

Apr 11, 2017 cryptography - SHA 256 pseuedocode? - Stack Overflow