Re: [Cfrg] Wack-A-Mole and PKEX 3.0 -> Re: Fwd: New Version Notification for draft-harkins-pkex-00.txt

Watson Ladd <> Tue, 13 September 2016 21:56 UTC

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From: Watson Ladd <>
Date: Tue, 13 Sep 2016 14:56:01 -0700
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To: Dan Harkins <>
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Cc: "Adrangi, Farid" <>, "" <>
Subject: Re: [Cfrg] Wack-A-Mole and PKEX 3.0 -> Re: Fwd: New Version Notification for draft-harkins-pkex-00.txt
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<Massive exchange everyone has given up on chopped>

What assurance do we have that PKEX actually satisfies the security
claims claimed for it? Don't you think a conference paper is a better
place to put a new protocol then an IRTF mailing list consisting of
people almost entirely unqualified to do the sort of analysis you are
calling for, and with no proof of security, or even formal security
claims put forward?

The commitments do not bind properly: this is obvious. It is not clear
what the KDF is used for, or what properties it requires. Furthermore,
there is no reason to believe that the identities are "trusted":
clearly anyone with the shared password can register whatever keys
they want with whatever identities they desire.  All that is
ostensibly known is that someone who knows the private key and the
password has participated in the protocol. It is clear this is an
inherent property of an protocol.

>   Dan.
> _______________________________________________
> Cfrg mailing list

"Man is born free, but everywhere he is in chains".