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Certificate Transparency

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Ben Laurie , Adam Langley , Emilia Kasper
Last updated 2014-04-07 (Latest revision 2013-10-04)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
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This Internet-Draft is no longer active.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 describes an experimental protocol for publicly logging the existence of Transport Layer Security (TLS) certificates as they are issued or observed, in a manner that allows anyone to audit certificate authority (CA) activity and notice the issuance of suspect certificates as well as to audit the certificate logs themselves. The intent is that eventually clients would refuse to honor certificates that do not appear in a log, effectively forcing CAs to add all issued certificates to the logs. Logs are network services that implement the protocol operations for submissions and queries that are defined in this document.


Ben Laurie
Adam Langley
Emilia Kasper

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