It is almost certain that most uses of EC would not infringe the remaining

But the patent holder can force anyone attempting to use them to spend
about $3-5 million to defend their right to use EC and so there is very
little incentive to do so given that RSA 2048 is sufficient for almost any

The situation might change depending on who buys RIM.

On Tue, Aug 20, 2013 at 1:38 PM, Perry E. Metzger <>wrote:

> What is the current state of patents on elliptic curve cryptosystems?
> (It would also be useful to know when the patents on such patents as
> exist end.)
> Perry
> --
> Perry E. Metzger      
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