Cancel-Locks in Netnews Articles
RFC 8315

Document Type RFC - Proposed Standard (February 2018; No errata)
Updates RFC 5537
Was draft-baeuerle-netnews-cancel-lock (individual in art area)
Last updated 2018-02-13
Replaces draft-ietf-usefor-cancel-lock
Stream IETF
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Reviews
Stream WG state (None)
Document shepherd Julien √ČLIE
Shepherd write-up Show (last changed 2017-05-30)
IESG IESG state RFC 8315 (Proposed Standard)
Consensus Boilerplate Yes
Telechat date
Responsible AD Alexey Melnikov
Send notices to =?utf-8?q?Julien_=C3=89LIE?= <julien@trigofacile.com>
IANA IANA review state Version Changed - Review Needed
IANA action state RFC-Ed-Ack
Internet Engineering Task Force (IETF)                       M. Baeuerle
Request for Comments: 8315                                STZ Elektronik
Updates: 5537                                              February 2018
Category: Standards Track
ISSN: 2070-1721

                    Cancel-Locks in Netnews Articles

Abstract

   This document defines an extension to the Netnews Article Format that
   may be used to authenticate the withdrawal of existing articles.
   This document updates RFC 5537.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8315.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Baeuerle                     Standards Track                    [Page 1]
RFC 8315                      Cancel-Locks                 February 2018

Table of Contents

   1. Introduction ....................................................2
      1.1. Conventions Used in This Document ..........................3
   2. Header Fields ...................................................3
      2.1. Cancel-Lock ................................................4
      2.2. Cancel-Key .................................................4
   3. Use .............................................................5
      3.1. Adding an Initial Cancel-Lock Header Field to a
           Proto-Article ..............................................5
      3.2. Extending the Cancel-Lock Header Field of a Proto-Article ..6
      3.3. Adding a Cancel-Key Header Field to a Proto-Article ........6
      3.4. Extending the Cancel-Key Header Field of a Proto-Article ...7
      3.5. Check a Cancel-Key Header Field ............................7
   4. Calculating the Key Data ........................................8
   5. Examples ........................................................9
      5.1. Without UID ................................................9
      5.2. With UID ..................................................10
      5.3. Other Examples ............................................11
      5.4. Manual Checks .............................................12
   6. Obsolete Syntax ................................................12
   7. Security Considerations ........................................13
   8. IANA Considerations ............................................15
      8.1. Algorithm Name Registration Procedure .....................16
      8.2. Change Control ............................................16
      8.3. Registration of the Netnews Cancel-Lock Hash Algorithms ...17
   9. References .....................................................18
      9.1. Normative References ......................................18
      9.2. Informative References ....................................19
   Acknowledgements ..................................................20
   Author's Address ..................................................20

1.  Introduction

   The authentication system defined in this document is intended to be
   used as a simple method to verify that the withdrawal of an article
   is valid; that is to say the poster, posting agent, moderator, or
   injecting agent that processed the original article has requested to
   withdraw it via the use of a cancel control article
   ([RFC5537] Section 5.3) or a Supersedes header field
   ([RFC5537] Section 5.4).

   This document defines two new header fields: Cancel-Lock and
   Cancel-Key.  The Cancel-Lock header field contains hashes of secret
   data.  The preimages can later be used in the Cancel-Key header field
   to authenticate a cancel or supersede request.

Baeuerle                     Standards Track                    [Page 2]
RFC 8315                      Cancel-Locks                 February 2018

   One property of this system is that it prevents tracking of
   individual users.
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