1. “Information Security in a Multi-user Computer Environment”;Anderson,1972
2. “Password Authentication with Insecure Communications”;Lamport,1981
3. “Kerberos: An Authentication Service for Computer Networks”;Neuman;IEEE Communications,1994
4. “The Digital Distributed System Security Architecture”;Gasser,1989
5. “Assertions and Protocol for the OASIS Security Assertion Mark-up Language (SAML)”,2003