A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Simple Authentication and Security Layer Working Group of the IETF.
Abstract: “This document defines a simple challenge-response authentication mechanism, using a keyed-hash digest, for use with the Simple Authentication and Security Layer (SASL).”
http://www.ietf.org/internet-drafts/draft-ietf-sasl-crammd5-02.txt