1. National Institute of Standards and Technology (NIST). Secure Hash Standard (SHS), FIPS PUB, 180–2, Standard, 2002.
2. National Institute of Standards and Technology (NIST). The Keyed-Hash Message Authentication Code (HMAC), FIPS PUB, 198 Standard, 2002.
3. National Institute of Standards and Technology (NIST). Digital Signature Standard (DSS), FIPS PUB, 186–2, 2000.
4. IP Security Protocol (IPSEC) Charter—Latest RFCs and Internet Drafts for IPSec, http://www.ietf.org/html.charters/ipsec-charter.html.
5. National Institute of Standards and Technology (NIST). Escrowed Encryption Standard (EES), FIPS PUB, 185, 1994.