http://www.rfc-editor.org/rfc/rfc6278.txt
RFC 6278: Use of Static-Static Elliptic Curve Diffie-Hellman Key Agreement in Cryptographic Message Syntax, J. Herzog, R. Khazan2011-06-01T23:00:00-00:00This document describes how to use the 'static-static Elliptic Curve Diffie-Hellman key-agreement scheme (i.e., Elliptic Curve Diffie- Hellman where both participants use static Diffie-Hellman values) with the Cryptographic Message Syntax. In this form of key agreement, the Diffie-Hellman values of both the sender and receiver are long-term values contained in certificates. This document is not an Internet Standards Track specification; it is published for informational purposes.