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Sender Authentication and the Surreptitious Forwarding Attack in CMS and S/MIME
draft-ietf-smime-sender-auth-00

Document Type Expired Internet-Draft (smime WG)
Expired & archived
Author Donald T. Davis
Last updated 2001-10-01
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Formats
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
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This Internet-Draft is no longer active.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:

Abstract

By default, a CMS signed-and-encrypted document or message authenticates only the document's originator, and not the person who encrypted the document. This subtle limitation exposes CMS and S/MIME signed-and-encrypted data to 'surreptitious forwarding.' Secure-messaging standards have treated surreptitious forwarding as an insoluble problem of user carelessness, and have long accepted the risk of this attack. This document discusses easy cryptographic remedies for this attack, suitable for incorporation into the CMS and S/MIME specifications. This document is an abridgement of [U2001].

Authors

Donald T. Davis

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