[Cfrg] Elliptic Curve patents

Michael Scott <mike.scott@miracl.com> Fri, 07 October 2016 09:57 UTC

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From: Michael Scott <mike.scott@miracl.com>
Date: Fri, 7 Oct 2016 10:57:03 +0100
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Subject: [Cfrg] Elliptic Curve patents
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I was just doing some checking on the status of patents as applicable to
Elliptic Curve Cryptography, and I came across the very impressive patent
portfolio of one Bernd Meyer.

http://patents.justia.com/inventor/bernd-meyer?page=2

See for example this one..

Cryptographic method with elliptical curves
<http://patents.justia.com/patent/8582761>
Patent number: 8582761
Abstract: A method determines an elliptical curve, suitable for a
cryptographic method. An elliptical curve to be tested is prepared. The
order of a twisted elliptical curve associated with the elliptical curve to
be tested is determined. It is automatically checked whether the order of
the twisted elliptical curve is a strong prime number. If the order of the
twisted elliptical curve is a strong prime number, the elliptical curve to
be tested is selected as an elliptical curve suitable for cryptographical
methods.
Type: Grant
Filed: March 6, 2007
Date of Patent: November 12, 2013
Assignee: Siemens Aktiengesellschaft
Inventors: Jean Georgiades, Anton Kargl, Bernd Meyer

Now I know that no-one here is a lawyer. But I would read this as
suggesting that Siemens holds a patent on twist secure curves (like
GoldiLocks).

Tell me it ain't so. And not just that, if you look at the full portfolio,
many other commonly used techniques for ECC are also covered.


Mike Scott