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RFC 7633
Title: X.509v3 Transport Layer Security (TLS)
Feature Extension
Author: P. Hallam-Baker
Status: Standards Track
Stream: IETF
Date: October 2015
Mailbox: philliph@comodo.com
Pages: 11
Characters: 21839
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-hallambaker-tlsfeature-10.txt
URL: https://www.rfc-editor.org/info/rfc7633
DOI: http://dx.doi.org/10.17487/RFC7633
The purpose of the TLS feature extension is to prevent downgrade
attacks that are not otherwise prevented by the TLS protocol. In
particular, the TLS feature extension may be used to mandate support
for revocation checking features in the TLS protocol such as Online
Certificate Status Protocol (OCSP) stapling. Informing clients that
an OCSP status response will always be stapled permits an immediate
failure in the case that the response is not stapled. This in turn
prevents a denial-of-service attack that might otherwise be possible.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
standardization state and status of this protocol. Distribution of this
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