http://www.rfc-editor.org/rfc/rfc2408.txt
RFC 2408: Internet Security Association and Key Management Protocol (ISAKMP), D. Maughan, M. Schertler, M. Schneider, J. Turner1998-11-01T23:00:00-00:00This memo describes a protocol utilizing security concepts necessary for establishing Security Associations (SA) and cryptographic keys in an Internet environment. [STANDARDS-TRACK]