http://www.rfc-editor.org/rfc/rfc6112.txt
RFC 6112: Anonymity Support for Kerberos, L. Zhu, P. Leach, S. Hartman2011-04-01T23:00:00-00:00This document defines extensions to the Kerberos protocol to allow a Kerberos client to securely communicate with a Kerberos application service without revealing its identity, or without revealing more than its Kerberos realm. It also defines extensions that allow a Kerberos client to obtain anonymous credentials without revealing its identity to the Kerberos Key Distribution Center (KDC). This document updates RFCs 4120, 4121, and 4556. [STANDARDS-TRACK]