http://www.rfc-editor.org/rfc/rfc6495.txt
RFC 6495: Subject Key Identifier (SKI) SEcure Neighbor Discovery (SEND) Name Type Fields, R. Gagliano, S. Krishnan, A. Kukec2012-02-01T23:00:00-00:00SEcure Neighbor Discovery (SEND) defines the Name Type field in the ICMPv6 Trust Anchor option. This document specifies new Name Type fields based on certificate Subject Key Identifiers (SKIs). [STANDARDS-TRACK]