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In cryptography, scrypt (pronounced "ess crypt" [1]) is a password-based key derivation function created by Colin Percival in March 2009, originally for the Tarsnap online backup service. [ 2 ] [ 3 ] The algorithm was specifically designed to make it costly to perform large-scale custom hardware attacks by requiring large amounts of memory.
Scrypt, an alternative proof-of-work algorithm, is used for Litecoin. According to Motherboard, "Scrypt was chosen because it theoretically prevents the use of ASICs, those specialized chips that greatly increase mining power and efficiency (though there is debate over the validity of this claim).". [26]
Scrypt was chosen because it is memory bound rather than CPU bound. [15] Once a user registers with the app, they are issued a unique 128 bit pseudo-random identifier (PUID) by the server. It will be marked inactive until the app solves the PoW challenge with the input parameters of i n p u t = n o n c e | | c h a l l e n g e {\displaystyle ...
As memory cost is platform-independent, [1] MHFs have found use in cryptocurrency mining, such as for Litecoin, which uses scrypt as its hash function. [3] They are also useful in password hashing because they significantly increase the cost of trying many possible passwords against a leaked database of hashed passwords without significantly ...
Argon2 is a key derivation function that was selected as the winner of the 2015 Password Hashing Competition. [1] [2] It was designed by Alex Biryukov, Daniel Dinu, and Dmitry Khovratovich from the University of Luxembourg. [3]
GPU mining is the use of Graphics Processing Units (GPUs) to "mine" proof-of-work cryptocurrencies, such as Bitcoin. [1] Miners receive rewards for performing computationally intensive work, such as calculating hashes, that amend and verify transactions on an open and decentralized ledger.
In computer science and cryptography, Whirlpool (sometimes styled WHIRLPOOL) is a cryptographic hash function.It was designed by Vincent Rijmen (co-creator of the Advanced Encryption Standard) and Paulo S. L. M. Barreto, who first described it in 2000.
Example of a Key Derivation Function chain as used in the Signal Protocol.The output of one KDF function is the input to the next KDF function in the chain. In cryptography, a key derivation function (KDF) is a cryptographic algorithm that derives one or more secret keys from a secret value such as a master key, a password, or a passphrase using a pseudorandom function (which typically uses a ...