Using Secure DNS to Assert S/MIME Usage

Document Type Expired Internet-Draft (individual)
Author Scott Rose 
Last updated 2014-03-27 (latest revision 2013-09-23)
Stream (None)
Intended RFC status (None)
Expired & archived
plain text htmlized pdfized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
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This Internet-Draft is no longer active.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


This draft defines and discusses the use of a new DNS resource record (RR) type to address S/MIME downgrade attacks. The SMIMELOCK RR allows a domain to convey general message security policy. Primarily, this RR allows the domain owner to advertise a policy that all legitimate messages from this domain will be signed by a verifiable certificate.


Scott Rose (

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