Cryptographic algorithms

cryptosystem that uses one key

type of shift register in computing

algorithm that uses a block cipher to provide an information service such as confidentiality or authenticity

In cryptography, an S-box (substitution-box) is a basic component of symmetric key algorithms which performs substitution. In block ciphers, they are typically used to obscure the relationship between the key and the ciphertext, thus ensuring Shannon's property of confusion. Mathematically, an S-box is a nonlinear vectorial Boolean function.

type of exponentiation performed over a modulus

cipher design construction

authentication algorithm

In cryptography, scrypt (pronounced "ess crypt") is a password-based key derivation function created by Colin Percival in March 2009, originally for the Tarsnap online backup service. The algorithm was specifically designed to make it costly to perform large-scale custom hardware attacks by requiring large amounts of memory. In 2016, the scrypt algorithm was published by IETF as RFC 7914. A simplified version of scrypt is used as a proof-of-work scheme by a number of cryptocurrencies, first implemented by an anonymous programmer called ArtForz in Tenebrix and followed by Fairbrix and Litecoin

The BB84 protocol, named after its inventors Charles Bennett and Gilles Brassard in 1984, is a prepare-and-measure Quantum key distribution (QKD) protocol, in which, one party (e.g. Alice) performs the encoding by preparing the quantum states, and the other party (e.g., Bob) measures them. The BB84 QKD scheme is the first quantum cryptography protocol, and has become one of the most well-studied QKD protocols. The protocol is provably secure assuming a perfect implementation, relying on two conditions: (1) the quantum property that information gain is only possible at the expense of disturbing

pseudorandom number generator with good statistical randomness and resistance to cryptanalysis

algorithm that calculates all the round keys from the key

password authentication algorithm

cryptographic key management algorithm

method of producing many one-time keys from a single key or password

algorithm

software program or hardware device that takes input from a random or pseudo-random number generator and automatically generates a password

algorithms to generate prime numbers

polyalphabetic encryption system

algorithm for fast modular multiplication

post-quantum cryptographic algorithm

cryptographic key-wrapping algorithm