Transport Layer Security (TLS) Cached Information Extension

Document Type Expired Internet-Draft (tls WG)
Last updated 2015-09-24 (latest revision 2015-03-23)
Replaces draft-santesson-tls-certcache
Stream IETF
Intended RFC status Proposed Standard
Expired & archived
plain text pdf html
Stream WG state In WG Last Call
Document shepherd J. Salowey
IESG IESG state Expired
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Transport Layer Security (TLS) handshakes often include fairly static information, such as the server certificate and a list of trusted certification authorities (CAs). This information can be of considerable size, particularly if the server certificate is bundled with a complete certificate chain (i.e., the certificates of intermediate CAs up to the root CA). This document defines an extension that allows a TLS client to inform a server of cached information, allowing the server to omit already available information.


Stefan Santesson (
Hannes Tschofenig (

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