| Internet-Draft | (Deprecated) Protected E-mail Headers | April 2025 |
| Einarsson, et al. | Expires 18 October 2025 | [Page] |
This is a tombstone document of an abandoned effort to provide end-to-end cryptographic protections for e-mail headers.
It has been superseded by draft-ietf-lamps-header-protection¶
This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.¶
Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at https://datatracker.ietf.org/drafts/current/.¶
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This Internet-Draft will expire on 18 October 2025.¶
Copyright (c) 2025 IETF Trust and the persons identified as the document authors. All rights reserved.¶
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This document has been superseded by [I-D.ietf-lamps-header-protection].¶
[ RFC Editor: please remove this section before publication ]¶
This document is currently edited as markdown. Minor editorial changes can be suggested via merge requests at https://github.com/autocrypt/protected-headers or by e-mail to the authors. Please direct all significant commentary to the public IETF LAMPS mailing list: spasm@ietf.org¶
Significant changes between version -02 and -03:¶
"Tombstone" this document in favor of draft-ietf-lamps-header-protection¶
Significant changes between version -01 and -02:¶
Added S/MIME test vectors in addition to PGP/MIME¶
Legacy Display parts should now be text/plain and not text/rfc822-headers¶
Cryptographic Payload must have protected-headers parameter set to v1¶
Test vector sample Message-Ids have been normalized¶
Added encrypted-only (unsigned) test vectors, at the suggestion of Russ Housley¶
Changes between version -00 and -01:¶
Credit Randall for "correct horse battery staple".¶
Adjust test vectors to ensure no line in the generated .txt format exceeds 72 chars.¶
Minor formatting cleanup to appease idnits.¶
Update references to more recent documents (RFC 2822 -> 5322, -00 to -01 of draft-ietf-lamps-header-protection-requirements).¶
The set of constructs and algorithms in this document has a previous working title of "Memory Hole", but that title is no longer used as different implementations gained experience in working with it.¶
These ideas were tested and fine-tuned in part by the loose collaboration of MUA developers known as [Autocrypt].¶
Additional feedback and useful guidance was contributed by attendees of the OpenPGP e-mail summit ([OpenPGP-Email-Summit-2019]).¶
The following people have contributed implementation experience, documentation, critique, and other feedback:¶
The password example used in previous versions comes from [xkcd936].¶