Re: [openpgp] Fingerprint requirements for OpenPGP
Joseph Lorenzo Hall <joe@cdt.org> Wed, 13 April 2016 15:24 UTC
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From: Joseph Lorenzo Hall <joe@cdt.org>
Date: Wed, 13 Apr 2016 11:23:44 -0400
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To: Vincent Breitmoser <look@my.amazin.horse>
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Cc: IETF OpenPGP <openpgp@ietf.org>
Subject: Re: [openpgp] Fingerprint requirements for OpenPGP
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On Tue, Apr 12, 2016 at 9:15 AM, Vincent Breitmoser <look@my.amazin.horse> wrote: > Joseph Lorenzo Hall(joe@cdt.org)@Tue, Apr 12, 2016 at 09:06:11AM -0400: >> If you have two keys that map to the same fingerprint, then an >> attacker can decide to serve you whichever is in their best interest. > > The premise of your scenario is that you are already using a key > generated by the attacker. What could an attacker possibly gain by > possessing a second key with the same fingerprint? Sorry so slow to respond... my premise is that increasingly I query for full fprs to obain keys from keyservers and if that maps onto two different keys with the same UserID that would be bad. I guess what the rest of the thread here is saying is that it would be so computationally difficult for a malicious keyserver to find a collision that this isn't a problem. (apologies for being somewhat dense) -- Joseph Lorenzo Hall Chief Technologist, Center for Democracy & Technology [https://www.cdt.org] e: joe@cdt.org, p: 202.407.8825, pgp: https://josephhall.org/gpg-key Fingerprint: 3CA2 8D7B 9F6D DBD3 4B10 1607 5F86 6987 40A9 A871
- [openpgp] Fingerprint requirements for OpenPGP Daniel Kahn Gillmor
- Re: [openpgp] Fingerprint requirements for OpenPGP Vincent Breitmoser
- Re: [openpgp] Fingerprint requirements for OpenPGP Joseph Lorenzo Hall
- Re: [openpgp] Fingerprint requirements for OpenPGP Vincent Breitmoser
- Re: [openpgp] Fingerprint requirements for OpenPGP Daniel Kahn Gillmor
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Daniel Kahn Gillmor
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Daniel Kahn Gillmor
- Re: [openpgp] Fingerprint requirements for OpenPGP Salz, Rich
- Re: [openpgp] Fingerprint requirements for OpenPGP Daniel Kahn Gillmor
- Re: [openpgp] Fingerprint requirements for OpenPGP Werner Koch
- Re: [openpgp] Fingerprint requirements for OpenPGP Werner Koch
- Re: [openpgp] Fingerprint requirements for OpenPGP KellerFuchs
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Jon Callas
- [openpgp] proof-of-work fingerprints [was: Re: Fi… Daniel Kahn Gillmor
- Re: [openpgp] Fingerprint requirements for OpenPGP Daniel Kahn Gillmor
- Re: [openpgp] Fingerprint requirements for OpenPGP Werner Koch
- Re: [openpgp] Fingerprint requirements for OpenPGP Bill Frantz
- Re: [openpgp] Fingerprint requirements for OpenPGP Werner Koch
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Joseph Lorenzo Hall
- Re: [openpgp] Fingerprint requirements for OpenPGP Werner Koch
- Re: [openpgp] Fingerprint requirements for OpenPGP Werner Koch
- Re: [openpgp] Fingerprint requirements for OpenPGP Vincent Breitmoser
- Re: [openpgp] Fingerprint requirements for OpenPGP Joseph Lorenzo Hall
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Derek Atkins
- Re: [openpgp] Fingerprint requirements for OpenPGP Joseph Lorenzo Hall
- Re: [openpgp] Fingerprint requirements for OpenPGP Phillip Hallam-Baker
- Re: [openpgp] proof-of-work fingerprints [was: Re… Phillip Hallam-Baker
- Re: [openpgp] proof-of-work fingerprints [was: Re… Phillip Hallam-Baker