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block cipher
(redirected from Codebook algorithm)

   Also found in: Wikipedia 0.04 sec.

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.



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