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Extensions to Salted Challenge Response (SCRAM) for 2 factor authentication

Document Type Expired Internet-Draft (kitten WG)
Expired & archived
Author Alexey Melnikov
Last updated 2022-07-29 (Latest revision 2022-01-25)
Replaces draft-melnikov-scram-2fa
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Stream WG state WG Document
Associated WG milestone
Apr 2022
Decide on preferred solution(s) for 2-Factor Authentication in SASL
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This specification describes an extension to family of Simple Authentication and Security Layer (SASL; RFC 4422) authentication mechanisms called the Salted Challenge Response Authentication Mechanism (SCRAM), which provides support for 2 factor authentication. It also includes a separate extension for quick reauthentication. This specification also gives an example of how TOTP (RFC 6238) can be used as the second factor.


Alexey Melnikov

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)