[146535] in cryptography@c2.net mail archive
Re: [Cryptography] NSA and cryptanalysis
daemon@ATHENA.MIT.EDU (Jon Callas)
Tue Sep 3 12:31:56 2013
X-Original-To: cryptography@metzdowd.com
From: Jon Callas <jon@callas.org>
In-Reply-To: <CAMm+Lwip1UZsBtg8PbgH7Ek=gcF1xWdAqCSCob6dzAA6btU-eg@mail.gmail.com>
Date: Tue, 3 Sep 2013 09:28:29 -0700
To: Phillip Hallam-Baker <hallam@gmail.com>
Cc: "cryptography@metzdowd.com" <cryptography@metzdowd.com>,
Jon Callas <jon@callas.org>, Jack Lloyd <lloyd@randombit.net>
Errors-To: cryptography-bounces+crypto.discuss=bloom-picayune.mit.edu@metzdowd.com
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>
> What is the state of prior art for the P-384? When was it first published?
>
> Given that RIM is trying to sell itself right now and the patents are the only asset worth having, I don't have good feelings on this. Well apart from the business opportunities for expert witnesses specializing in crypto.
>
> The problem is that to make the market move we need everyone to decide to go in the same direction. So even though my employer can afford a license, there is no commercial value to that license unless everyone else has access.
>
>
> Do we have an ECC curve that is (1) secure and (2) has a written description prior to 1 Sept 1993?
>
> Due to submarine patent potential, even that is not necessarily enough but it would be a start.
My understanding is that of the NIST curves, P-256 and P-384 are unencumbered and that P-521 was dropped from Suite B because of IP concerns along with MQV. I don't pretend to speak with authority on any of it. The niggling things often don't make sense. I'm just saying what my understanding is.
Jon
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