[Cryptography] Large companies sued for using Elliptic Curve TLS?

Phillip Hallam-Baker phill at hallambaker.com
Wed Dec 2 16:54:25 EST 2015

On Wed, Dec 2, 2015 at 2:26 PM, Tony Arcieri <bascule at gmail.com> wrote:

> On Tue, Dec 1, 2015 at 5:41 PM, Phillip Hallam-Baker <
> phill at hallambaker.com> wrote:
>> In this particular instance, the patent can be read as describing El
>> Gamal signatures which are actually used in ECC certificates since DSA is a
>> variation of El Gamal. But that approach falls foul of prior art because El
>> Gamal and DSA were both published long before the patent was issued.
> See also the Schnorr signature patent. DSA is something of a hybrid of El
> Gamal and Schnorr, and Schnorr insisted DSA violated his patent.
> The signature algorithm to be adopted by the CFRG will be a Schnorr
> variant.

Schnorr is also expired. But the reason I didn't reference it is that the
Schnorr part does not seem to be relevant to the claims.

The CFRG signature algorithm is equally irrelevant as nobody can possibly
be infringing with an algorithm we haven't invented yet.
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