1. FIPS PUB 46: Data Encryption Standard (DES). National Institute of Standards and Technology (1977)
2. ANSI X9.52: Triple Data Encryption Algorithm Modes of Operation (1998)
3. FIPS PUB 46-3: Data Encryption Standard (DES). National Institute of Standards and Technology (1999)
4. FIPS PUB 197: Advanced Encryption Standard (AES). National Institute of Standards and Technology (2001)
5. NIST SP 800-67: Recommendation for the Triple Data Encryption Algorithm (TDEA) Block Cipher. National Institute of Standards and Technology (2004)