block cipher

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block cipher

[′bläk ‚sī·fər]
(communications)
A cipher that transforms a string of input bits of fixed length into a string of output bits of fixed length.

block cipher

An encryption method that processes the input stream as groups of bytes that are fixed in size, typically 64, 128 or 256 bits long. The state of a block cipher is reset before processing each block. The DES and AES algorithms are examples of block ciphers (see DES and AES). Contrast with stream cipher.
References in periodicals archive ?
Digify uses the 256-bit Advanced Encryption Standard (AES-256), one of the strongest block ciphers available.
Stream ciphers are usually light weight and faster than block ciphers but vulnerable to various attacks [9].
12288;The standard consists of 4 parts: 1) General, 2) Block ciphers, 3) Stream ciphers, and 4) Mechanism for using public key cryptography.
The nonlinear filter function is replaced by NMix, a nonlinear key mixing function used for block ciphers.
The standard comprises three block ciphers, AES-128, AES-192 and AES-256 and specifies that each AES cipher has a 128-bit block size, with encryption key sizes of 128, 192 and 256 bits, respectively.
Data-driven block ciphers for fast telecommunication systems.
Jakobsen also built an esteemed career as an academic, having been assistant professor at the Technical University of Denmark, where he co-invented the so-called interpolation attack on block ciphers.
3) One of the standard configuration methods of block ciphers proposed in 1989.
The first half of the book introduces core principles, discusses private-key encryption and message authentication, and illustrates design principles for block ciphers.
Block ciphers use initialization vectors (IVs) to ward off what is called block replay.
Stream ciphers can be much more efficient for encryption than the more common block ciphers, such as the Advanced Encryption Standard.
ISO/IEC 29192-2, Information technology − Security techniques − Lightweight cryptography − Part 2: Block ciphers