IETF Logo Mail Archive

Re: [openpgp] [RFC4880bis PATCH] Deprecate "Revocation Key", replacing with full-key "Designated Revoker"

Daniel Kahn Gillmor <dkg@fifthhorseman.net> Wed, 31 July 2019 20:38 UTC

Return-Path: <dkg@fifthhorseman.net>
X-Original-To: openpgp@ietfa.amsl.com
Delivered-To: openpgp@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B7A2012002F for <openpgp@ietfa.amsl.com>; Wed, 31 Jul 2019 13:38:50 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2
X-Spam-Level:
X-Spam-Status: No, score=-2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=neutral reason="invalid (unsupported algorithm ed25519-sha256)" header.d=fifthhorseman.net header.b=bfeZ90Gs; dkim=pass (2048-bit key) header.d=fifthhorseman.net header.b=vxpf3m75
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yvLbj10tJ53G for <openpgp@ietfa.amsl.com>; Wed, 31 Jul 2019 13:38:49 -0700 (PDT)
Received: from che.mayfirst.org (che.mayfirst.org [IPv6:2001:470:1:116::7]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D1E7B120018 for <openpgp@ietf.org>; Wed, 31 Jul 2019 13:38:48 -0700 (PDT)
DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/simple; d=fifthhorseman.net; i=@fifthhorseman.net; q=dns/txt; s=2019; t=1564605528; h=from : to : subject : in-reply-to : references : date : message-id : mime-version : content-type : from; bh=G93YToycBTtKKvkLDfkjUUBxigpLTUN2ZXLM28Yo94Q=; b=bfeZ90Gs8LumVKsDpaXCy0zld1696/F1ggzMYomdaPLfPGVGSsNuxpzs ZbXu1iCrvU9W8d/I4sZVs3Ggm57dBA==
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=fifthhorseman.net; i=@fifthhorseman.net; q=dns/txt; s=2019rsa; t=1564605528; h=from : to : subject : in-reply-to : references : date : message-id : mime-version : content-type : from; bh=G93YToycBTtKKvkLDfkjUUBxigpLTUN2ZXLM28Yo94Q=; b=vxpf3m75jGJb6uz6lKvG5ZowEL9qZ+6CjFkfGppPhvhfDWitR2vZnwNt oXwl+yn9uVsv+sDN8Lv9p/a7WWx/wBcEFHS7BprYQi1XcLkOFue7giB/U/ r+22TT2sAsvLlJ2JMFOZvIbKDZyIGMQ6TqWuSRBIkkjeOv6ALqgJ6B6Chj xfoaLap0PyhBpwMzf5+KIa5dHohseWn0Kvv1vyQTnRhW+GDzCJtF2HwuRS jfiMJ4rittl39y1xkIqBOGTt0+ksrG1Mq/uvNQpo3sIb+JMPZAjOrcvk+s xrkSwQCvzye6kgRjEwvHmsXxLKRbcr2xXcEVeb7PDtiTi041ENiohw==
Received: from fifthhorseman.net (unknown [38.109.115.130]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by che.mayfirst.org (Postfix) with ESMTPSA id 19FCFF99D for <openpgp@ietf.org>; Wed, 31 Jul 2019 16:38:48 -0400 (EDT)
Received: by fifthhorseman.net (Postfix, from userid 1000) id D90692025E; Wed, 31 Jul 2019 16:37:43 -0400 (EDT)
From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
To: IETF OpenPGP WG <openpgp@ietf.org>
In-Reply-To: <20190731203444.4822-1-dkg@fifthhorseman.net>
References: <87iocqepta.fsf@littlepip.fritz.box> <20190731203444.4822-1-dkg@fifthhorseman.net>
Autocrypt: addr=dkg@fifthhorseman.net; prefer-encrypt=mutual; keydata= mDMEXEK/AhYJKwYBBAHaRw8BAQdAr/gSROcn+6m8ijTN0DV9AahoHGafy52RRkhCZVwxhEe0K0Rh bmllbCBLYWhuIEdpbGxtb3IgPGRrZ0BmaWZ0aGhvcnNlbWFuLm5ldD6ImQQTFggAQQIbAQUJA8Jn AAULCQgHAgYVCgkICwIEFgIDAQIeAQIXgBYhBMS8Lds4zOlkhevpwvIGkReQOOXGBQJcQsbzAhkB AAoJEPIGkReQOOXG4fkBAO1joRxqAZY57PjdzGieXLpluk9RkWa3ufkt3YUVEpH/AP9c+pgIxtyW +FwMQRjlqljuj8amdN4zuEqaCy4hhz/1DbgzBFxCv4sWCSsGAQQB2kcPAQEHQERSZxSPmgtdw6nN u7uxY7bzb9TnPrGAOp9kClBLRwGfiPUEGBYIACYWIQTEvC3bOMzpZIXr6cLyBpEXkDjlxgUCXEK/ iwIbAgUJAeEzgACBCRDyBpEXkDjlxnYgBBkWCAAdFiEEyQ5tNiAKG5IqFQnndhgZZSmuX/gFAlxC v4sACgkQdhgZZSmuX/iVWgD/fCU4ONzgy8w8UCHGmrmIZfDvdhg512NIBfx+Mz9ls5kA/Rq97vz4 z48MFuBdCuu0W/fVqVjnY7LN5n+CQJwGC0MIA7QA/RyY7Sz2gFIOcrns0RpoHr+3WI+won3xCD8+ sVXSHZvCAP98HCjDnw/b0lGuCR7coTXKLIM44/LFWgXAdZjm1wjODbg4BFxCv50SCisGAQQBl1UB BQEBB0BG4iXnHX/fs35NWKMWQTQoRI7oiAUt0wJHFFJbomxXbAMBCAeIfgQYFggAJhYhBMS8Lds4 zOlkhevpwvIGkReQOOXGBQJcQr+dAhsMBQkB4TOAAAoJEPIGkReQOOXGe/cBAPlek5d9xzcXUn/D kY6jKmxe26CTws3ZkbK6Aa5Ey/qKAP0VuPQSCRxA7RKfcB/XrEphfUFkraL06Xn/xGwJ+D0hCw==
Date: Wed, 31 Jul 2019 16:37:43 -0400
Message-ID: <87a7curld4.fsf@fifthhorseman.net>
MIME-Version: 1.0
Content-Type: multipart/signed; boundary="=-=-="; micalg="pgp-sha512"; protocol="application/pgp-signature"
Archived-At: <https://mailarchive.ietf.org/arch/msg/openpgp/qUNTbNRveFnIXHq_qV-lvC1CqjI>
Subject: Re: [openpgp] [RFC4880bis PATCH] Deprecate "Revocation Key", replacing with full-key "Designated Revoker"
X-BeenThere: openpgp@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "Ongoing discussion of OpenPGP issues." <openpgp.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/openpgp>, <mailto:openpgp-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/openpgp/>
List-Post: <mailto:openpgp@ietf.org>
List-Help: <mailto:openpgp-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/openpgp>, <mailto:openpgp-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 31 Jul 2019 20:38:51 -0000

On Wed 2019-07-31 16:34:44 -0400, Daniel Kahn Gillmor wrote:
> The "revocation key" subpacket is problematic.  It is the the most
> fragile piece of the specification wrt the fingerprint (collisions
> against a fingerprint can create surprising revocation effects).  And
> it is potentially difficult to rely on for clients which might not be
> able to find the revoking key (for example, if keyservers are
> unavailable).
>
> It is also not currently widely used.
>
> This patch to the spec deprecates the "revocation key" subpacket and
> replaces it with a "designated revoker" subpacket that includes the
> full key, rather than the fingerprint.

this is also at https://gitlab.com/openpgp-wg/rfc4880bis/merge_requests/18

     --dkg

v2.23.0 | Report a Bug | By Email