Kerberos

Kerberos is an network authentication protocol designed to provide strong mutual authentication for client/server applications by using secret-key cryptography.

Resources:

• MIT Kerberos implementation [L1 ]
• GNU Kerberos implementation (Shishi) [L2 ]
• Wikipedia [L3 ]
• comp.protocols.kerberos FAQ [L4 ]

JKU TWAPI can work with Kerberos. See SASL and TWAPI.