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In cryptography, ARIA is a block cipher [1] designed in 2003 by a large group of South Korean researchers. [2] In 2004, the Korean Agency for Technology and Standards selected it as a standard cryptographic technique.
Careful choice must be made in selecting the mode of operation of the cipher. The simplest mode encrypts and decrypts each 128-bit block separately. In this mode, called electronic code book (ECB), blocks that are identical will be encrypted identically; this is entirely insecure.
In cryptography, XTEA (eXtended TEA) is a block cipher designed to correct weaknesses in TEA.The cipher's designers were David Wheeler and Roger Needham of the Cambridge Computer Laboratory, and the algorithm was presented in an unpublished technical report in 1997 (Needham and Wheeler, 1997).
In cryptography, the Tiny Encryption Algorithm (TEA) is a block cipher notable for its simplicity of description and implementation, typically a few lines of code.It was designed by David Wheeler and Roger Needham of the Cambridge Computer Laboratory; it was first presented at the Fast Software Encryption workshop in Leuven in 1994, and first published in the proceedings of that workshop.
The Japanese cipher has security levels and processing abilities comparable to the AES/Rijndael cipher. [3] Camellia is a block cipher which can be completely defined by minimal systems of multivariate polynomials: [vague] [5] The Camellia (as well as AES) S-boxes can be described by a system of 23 quadratic equations in 80 terms. [6]
Key whitening using the xor-encrypt-xor technique: a (short) Key is made longer with Key1 and Key2 parts. The most common form of key whitening is xor-encrypt-xor-- using a simple XOR before the first round and after the last round of encryption.
Shamir's secret sharing (SSS) is an efficient secret sharing algorithm for distributing private information (the "secret") among a group. The secret cannot be revealed unless a quorum of the group acts together to pool their knowledge.
The MixColumns operation performed by the Rijndael cipher or Advanced Encryption Standard is, along with the ShiftRows step, its primary source of diffusion.. Each column of bytes is treated as a four-term polynomial () = + + +, each byte representing an element in the Galois field ().