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Data Encryption Standard
data encryption standard[′dad·ə en‚krip·shən ′stan·dərd] (communications) A cryptographic algorithm of validated strength which is in the public domain and is accepted as a standard. Abbreviated DES. Data Encryption Standard(DES) The NBS's popular, standard encryption algorithm.It is a product cipher that operates on 64-bit blocks ofdata, using a 56-bit key. It is defined in FIPS 46-1 (1988)(which supersedes FIPS 46 (1977)). DES is identical to theANSI standard Data Encryption Algorithm (DEA) defined inANSI X3.92-1981.
DES has been implemented in VLSI. SunOS provides a descommand which can make use of DES hardware if fitted. Neitherthe software nor the hardware are supposed to be distributedoutside the USA.
Unix manual pages: des(1), des(3), des(4).data encryption standard
data encryption standard A Federal Information Processing Standards (FIPS)-approved cryptographic algorithm for encrypting (enciphering) and decrypting (deciphering) binary coded information. Encrypting converts data to an unintelligible form called cipher, which is converted back to its original form (plaintext) by decrypting. DES specifies both enciphering and deciphering operations, which are based on a 64-bit binary number (a key); unauthorised recipients of the cipher without the correct key cannot derive the original data algorithmically. Data that is considered sensitive by the responsible authority, or data that represents a high value, should be cryptographically protected if it is vulnerable to unauthorised disclosure or undetected modification during transmission or while in storage.AcronymsSeeDES |