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 ?
In the resource constrained environment symmetric key ciphers, particularly lightweight block ciphers still play a significant part to deliver confidentiality.
Block ciphers have to be confined to less GEs in order to fit in lightweight applications.
The authors cover block ciphers in general, digital circuits, hardware implementations for block ciphers, side-channel analysis and fault analysis on block ciphers, cryptoanalysis on block ciphers, and many other related topics over the bookAEs seven chapters.
According to the MalwareHunterTeam, once installed, attackers use Rijndael block ciphers to encrypt website files and demand Bitcoin payment ranging from $140 to $415 for decryption.
So, it is decided that block ciphers are not suitable for larger dynamically changing data.
The selected block ciphers are AES, MARS, Serpent, RC6, Twofish and IDEA.
Stream ciphers are usually light weight and faster than block ciphers but vulnerable to various attacks [9].
Lightweight stream ciphers are preferred over block ciphers because of compact size, less time complexity etc.
12288;The standard consists of 4 parts: 1) General, 2) Block ciphers, 3) Stream ciphers, and 4) Mechanism for using public key cryptography.
Mainly, there are two types of private-key encryption; stream ciphers and block ciphers [1].
The nonlinear filter function is replaced by NMix, a nonlinear key mixing function used for block ciphers.