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Re: [openpgp] New fingerprint: to v5 or not to v5

Peter Gutmann <pgut001@cs.auckland.ac.nz> Tue, 13 October 2015 04:19 UTC

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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: Werner Koch <wk@gnupg.org>
Thread-Topic: [openpgp] New fingerprint: to v5 or not to v5
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Date: Tue, 13 Oct 2015 04:19:26 +0000
Message-ID: <9A043F3CF02CD34C8E74AC1594475C73F4B33D20@uxcn10-5.UoA.auckland.ac.nz>
References: <878u84zy4r.fsf@vigenere.g10code.de> <87fv1xxe5w.fsf@alice.fifthhorseman.net> <87r3lgcup8.fsf@vigenere.g10code.de> <CACsn0c=-LKagSqTbgOV1W4Gu4u-f6vpVq82-nWSLGogjoeFKeg@mail.gmail.com> <CAMm+LwjeKDKnN2ZAisbKhWVS4kwCEm_VvcZ1MtftYzEJQpGdhg@mail.gmail.com> <87y4fi5wa9.fsf@vigenere.g10code.de> <9A043F3CF02CD34C8E74AC1594475C73F4B278ED@uxcn10-5.UoA.auckland.ac.nz> <8737xp5z45.fsf@vigenere.g10code.de> <9A043F3CF02CD34C8E74AC1594475C73F4B279C6@uxcn10-5.UoA.auckland.ac.nz> <87fv1o4e9n.fsf@vigenere.g10code.de> <9A043F3CF02CD34C8E74AC1594475C73F4B2C5EE@uxcn10-5.UoA.auckland.ac.nz> <87wpuy1njl.fsf@vigenere.g10code.de> <9A043F3CF02CD34C8E74AC1594475C73F4B2D5B1@uxcn10-5.UoA.auckland.ac.nz> <87bnc91i5y.fsf@vigenere.g10code.de> <9A043F3CF02CD34C8E74AC1594475C73F4B2D663@uxcn10-5.UoA.auckland.ac.nz>, <871td0w3mm.fsf@vigenere.g10code.de>
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Cc: Watson Ladd <watsonbladd@gmail.com>, Phillip Hallam-Baker <phill@hallambaker.com>, Daniel Kahn Gillmor <dkg@fifthhorseman.net>, IETF OpenPGP <openpgp@ietf.org>
Subject: Re: [openpgp] New fingerprint: to v5 or not to v5
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Werner Koch <wk@gnupg.org> writes:

>People have done this for X.509 keys a lot (although I heard that Mozilla now
>complains about using a new X.509 certificate with key material known from
>another certificate).

The practice is unfortunately far too common in the X.509 world, where the
same key is re-certified year in, year out.  The end result is a worst-of-
both-worlds system where you're forced to pay a CA every year to make the
browser warnings go away, but don't get the benefit of changing your key to
limit the damage due to a compromise.  It's more PKI security theatre I
guess...

Peter.

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