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Scrypt: C++ [10] PoW: One of the first cryptocurrencies to use scrypt as a hashing algorithm. 2011 Namecoin: NMC Vincent Durham [11] [12] SHA-256d: C++ [13] PoW: Also acts as an alternative, decentralized DNS. 2012 Peercoin: PPC Sunny King (pseudonym) [citation needed] SHA-256d [citation needed] C++ [14] PoW & PoS: The first cryptocurrency to ...
The scrypt function is designed to hinder such attempts by raising the resource demands of the algorithm. Specifically, the algorithm is designed to use a large amount of memory compared to other password-based KDFs, [ 6 ] making the size and the cost of a hardware implementation much more expensive, and therefore limiting the amount of ...
SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA) and first published in 2001. [ 3 ] [ 4 ] They are built using the Merkle–Damgård construction , from a one-way compression function itself built using the Davies–Meyer structure from a specialized block cipher.
The following tables compare general and technical information for a number of cryptographic hash functions. See the individual functions' articles for further information. This article is not all-inclusive or necessarily up-to-date. An overview of hash function security/cryptanalysis can be found at hash function security summary.
Litecoin was a source code fork of the Bitcoin Core client, originally differing by having a decreased block generation time (2.5 minutes), increased maximum number of coins, different hashing algorithm (scrypt, instead of SHA-256), faster difficulty retarget, and a slightly modified GUI. [citation needed]
Algorithm BLAKE2b Input: M Message to be hashed cbMessageLen: Number, (0..2 128) Length of the message in bytes Key Optional 0..64 byte key cbKeyLen: Number, (0..64) Length of optional key in bytes cbHashLen: Number, (1..64) Desired hash length in bytes Output: Hash Hash of cbHashLen bytes Initialize State vector h with IV h 0..7 ← IV 0..7 ...
Scrypt; Secret sharing using the Chinese remainder theorem; SecureLog; Six-state protocol; Software taggant; Substitution–permutation network; Summation generator; Supersingular isogeny key exchange; Symmetric-key algorithm
Some other hashing algorithms that are used for proof-of-work include CryptoNote, Blake, SHA-3, and X11. Another method is called the proof-of-stake scheme. Proof-of-stake is a method of securing a cryptocurrency network and achieving distributed consensus through requesting users to show ownership of a certain amount of currency.