# Data Encryption Standard

(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).

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