Including Recipients in DKIM Signatures
draft-kucherawy-dkim-rcpts-01

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Last updated 2017-05-19 (latest revision 2016-11-15)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at
https://www.ietf.org/archive/id/draft-kucherawy-dkim-rcpts-01.txt

Abstract

The DomainKeys Identified Mail (DKIM) protocol applies a domain-level cryptographic signature to an e-mail message. DKIM only guarantees authenticity of the message content and does not consider the message envelope. This allows for replay attacks by recycling a signed message with an arbitrary new set of recipients. This document presents a protocol extension that can include original envelope information in the signature data, so that an altered that information renders the signature invalid.

Authors

Murray Kucherawy (superuser@gmail.com)

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