Applicability of Keying Methods for RSVP Security

The Resource reSerVation Protocol (RSVP) allows hop-by-hop authentication of RSVP neighbors. This requires messages to be cryptographically signed using a shared secret between participating nodes. This document compares group keying for RSVP with per neighbor or per interface keying, and discusses the associated key provisioning methods as well as applicability and limitations of these approaches. The present document also discusses applicability of group keying to RSVP encryption.