(DES) The NBS' s popular, standard encryption algorithm. It is a product cipher that operates on 64-bit blocks of data, using a 56-bit key.It is defined in FIPS 46-1 (1988) (which supersedes FIPS 46 (1977)).DES is identical to the ANSI standard Data Encryption Algorithm (DEA) defined in ANSI X3.92-1981.DES has been implemented in VLSI.SunOS provides a des command which can make use of DES hardware if fitted.Neither the software nor the hardware are supposed to be distributed outside the USA.Unix manual pages: des(1), des(3), des(4).(1994-12-06)