The algorithm specified in FIPS PUB 46-3, Data Encryption Algorithm (DEA).
Sources:
NIST SP 800-20
The Data Encryption Algorithm specified in FIPS 46-3
Sources:
NIST SP 800-20
under DEA
The DEA cryptographic engine that is used by the Triple Data Encryption Algorithm (TDEA).
Sources:
NIST SP 800-67 Rev. 2
Data Encryption Algorithm, previously specified in FIPS 46 (now withdrawn).
Sources:
NIST SP 800-67 Rev. 2
under DEA