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block cipher
(redirected from Symmetric block cipher)

   Also found in: Wikipedia 0.03 sec.
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.
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.


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Federal Information Processing Standard (FIPS) 197, Advanced Encryption Standard, describes the AES algorithm as a symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information.
Business Editors/High-Tech Writers TOKYO--(BUSINESS WIRE)--March 10, 2000 Symmetric Block Cipher Achieves High Security and World's Highest Efficiency Nippon Telegraph and Telephone Corporation (NTT) and Mitsubishi Electric Corporation (Mitsubishi) announced today their joint development of "Camellia," a next-generation symmetric-key encryption algorithm(1).
 
 
 
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