* https://tools.ietf.org/html/rfc1964 The Kerberos Version 5 GSS-API Mechanism
* https://tools.ietf.org/html/rfc4120 '''The Kerberos Network Authentication Service (V5)'''
* https://tools.ietf.org/html/rfc4121 Generic Security Service Application Program Interface (GSS-API) Mechanism: Version 2
* https://tools.ietf.org/html/rfc4537 Kerberos Cryptosystem Negotiation Extension