DES

Data Encryption Standard (DES) is a standard block cipher (a building block for data encryption algorithms). It is considered to be obsolete.

It has a block size of 64 bits, and a key length of 56 bits.

Specifications

 * FIPS PUB 46 (1977)
 * FIPS PUB 46-1 (1988)
 * FIPS PUB 46-2 (1993)
 * FIPS PUB 46-3 (1999)

Links

 * FIPS PUB 81 (1980): DES Modes of Operation
 * FIPS PUB 74 (1981): DES implementation guidelines
 * Wikipedia article
 * Wikipedia: DES supplementary material