Re: [Cryptography] What is the state of patents on elliptic curve cryptography?

2013-08-23 Thread Phillip Hallam-Baker
On Thu, Aug 22, 2013 at 1:20 AM, Daira Hopwood da...@jacaranda.org wrote: On 20/08/13 19:26, Phillip Hallam-Baker wrote: It is almost certain that most uses of EC would not infringe the remaining patents. But the patent holder can force anyone attempting to use them to spend about $3-5

Re: [Cryptography] What is the state of patents on elliptic curve cryptography?

2013-08-23 Thread James A. Donald
On 2013-08-21 3:38 AM, 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 Such a question will be answered not with light but with darkness.

Re: [Cryptography] PRISM PROOF Email

2013-08-23 Thread Ben Laurie
On 22 August 2013 10:36, Phillip Hallam-Baker hal...@gmail.com wrote: Preventing key substitution will require a combination of the CT ideas proposed by Ben Laurie (so catenate proof notaries etc) and some form of 'no key exists' demonstration. We have already outline how to make verifiable

Re: [Cryptography] PRISM PROOF Email

2013-08-23 Thread Phillip Hallam-Baker
On Fri, Aug 23, 2013 at 6:02 PM, Philip Whitehouse phi...@whiuk.com wrote: Let me just see if I get where you're going: So essentially you've increased the number of CAs to the number of companies without really solving the PRISM problem. The sheer number mean it's impractical to do much

Re: [Cryptography] PRISM PROOF Email

2013-08-23 Thread Phillip Hallam-Baker
On Fri, Aug 23, 2013 at 6:42 PM, Joe St Sauver j...@oregon.uoregon.eduwrote: I wouldn't take Snowden's alleged opsec practice, or lack thereof, as a demonstration proof that PGP and/or S/MIME are impossibly difficult for technical people (or even motivated NON-technical people) to use when

Re: [Cryptography] PRISM PROOF Email

2013-08-23 Thread Phillip Hallam-Baker
On Fri, Aug 23, 2013 at 3:34 PM, Ben Laurie b...@links.org wrote: On 22 August 2013 10:36, Phillip Hallam-Baker hal...@gmail.com wrote: Preventing key substitution will require a combination of the CT ideas proposed by Ben Laurie (so catenate proof notaries etc) and some form of 'no key