The TCP Authentication Option (TCP-AO) relies on security algorithms to provide authentication between two end-points. There are many such algorithms available@ and two TCP-AO systems cannot interoperate unless they are using the same algorithms. This document specifies the algorithms and attributes that can be used in TCP-AO's current manual keying mechanism and provides the interface for future message authentication codes (MACs).
RFC 5926-2010 history
2010RFC 5926-2010 Cryptographic Algorithms for the TCP Authentication Option (TCP-AO)