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Deprecating MD5 and SHA-1 signature hashes in TLS 1.2

Document Type Replaced Internet-Draft (tls WG)
Expired & archived
Authors Loganaden Velvindron , Kathleen Moriarty , Alessandro Ghedini
Last updated 2019-08-08 (Latest revision 2019-05-29)
Replaced by RFC 9155
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-tls-md5-sha1-deprecate
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This Internet-Draft is no longer active.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:


The MD5 and SHA-1 hashing algorithms are steadily weakening in strength and their deprecation process should begin for their use in TLS 1.2 digital signatures. However, this document does not deprecate SHA-1 in HMAC for record protection.


Loganaden Velvindron
Kathleen Moriarty
Alessandro Ghedini

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