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TLS Fallback Signaling Cipher Suite Value (SCSV) for Preventing Protocol Downgrade Attacks

Document Type Replaced Internet-Draft (individual)
Expired & archived
Authors Bodo Moeller , Adam Langley
Last updated 2014-07-07 (Latest revision 2014-05-31)
Replaced by draft-ietf-tls-downgrade-scsv
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Replaced by draft-ietf-tls-downgrade-scsv
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This Internet-Draft is no longer active.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 document defines a Signaling Cipher Suite Value (SCSV) that prevents protocol downgrade attacks on the Transport Layer Security (TLS) protocol. It updates RFC 2246, RFC 4346, and RFC 5246.


Bodo Moeller
Adam Langley

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