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RFC 10015: Deprecating Obsolete Key Exchange Methods in TLS 1.2 and DTLS 1.2

In plain English — editorial summary, not part of the RFC

For (D)TLS 1.2, this document deprecates the use of two key exchanges, namely Diffie-Hellman (DH) over a finite field and RSA. It also discourages the use of static Elliptic Curve Diffie-Hellman (ECDH) cipher suites. These prescriptions apply only to (D)TLS 1.2, since (D)TLS 1.0 and TLS 1.1 are deprecated by RFC 8996 and (D)TLS 1.3 either does not use the affected algorithms or does not share the relevant configuration options. (There is no DTLS version 1.1.) This document updates RFCs 4162, 4279, 4346, 4785, 5246, 5288, 5289, 5469, 5487, 5932, 6209, 6347, 6367, 6655, 7905, 8422, and 9325 to either deprecate or discourage the use of cipher suites using the above key exchange methods in (D)TLS 1.2 connections.

Document record

Document ID
RFC10015
Published
July 2026
Authors
N. Aviram
Status
PROPOSED STANDARD
Stream
IETF
Area
sec
Pages
21
Also known as
—
Updates:
RFC 4162, RFC 4279, RFC 4346, RFC 4785, RFC 5246, RFC 5288, RFC 5289, RFC 5469, RFC 5487, RFC 5932, RFC 6209, RFC 6347, RFC 6367, RFC 6655, RFC 7905, RFC 8422, RFC 9325

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The document record above — title, authors, date, status, stream, area, relationships, DOI and errata — is imported verbatim from the public RFC Editor index. The “in plain English” section is editorial: written by The metasystema editorial team, not part of the RFC. Where the two differ, the RFC text governs.

Last checked against the RFC Editor index on . RFCs are never revised after publication; changes are issued as new documents.

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canonical URL: /rfc/10015-deprecating-obsolete-key-exchange-methods-in-tls-1-2-and-dtls-1-2