http://www.rfc-editor.org/rfc/rfc6786.txt
RFC 6786: Encrypting the Protocol for Carrying Authentication for Network Access (PANA) Attribute-Value Pairs, A. Yegin, R. Cragie2012-11-01T23:00:00-00:00This document specifies a mechanism for delivering the Protocol for Carrying Authentication for Network Access (PANA) Attribute-Value Pairs (AVPs) in encrypted form. [STANDARDS-TRACK]