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 ?
Additionally, SuperMAP has the widest algorithm support, including Public Key Infrastructures (PKI) with RSA or Elliptic Curve Cryptosystem (ECC), Symmetric Block Cypher and Data Hashing.
Beginning with sections on the basic cryptographic theory and historical cyphers, the volume cover such topics as public key encryption, block cyphers, hash functions and random numbers and stream cyphers.