Re: How broad is the SPEKE patent.

2005-11-11 Thread Florian Weimer
* James A. Donald: I figured that the obvious solution to all this was to deploy zero knowledge technologies, where both parties prove knowledge of the shared secret without revealing the shared secret. Keep in mind that one party runs the required software on a computed infected with

RE: How broad is the SPEKE patent.

2005-11-10 Thread James A. Donald
-- From: Charlie Kaufman From a legal perspective, they would probably have a better chance with SRP, since Stanford holds a patent and might be motivated to support the challenge. The vast majority of phishing attacks and other forms of man in the middle attack seek to

Re: How broad is the SPEKE patent.

2005-11-09 Thread Steven M. Bellovin
In message [EMAIL PROTECTED], James A. Donald writes: -- Does SPEKE claim to patent any uses of zero knowledge proof of possession of the password for mutual authentication, or just some particular method for establishing communications? Is there any way around the SPEKE patent for mutual

Re: How broad is the SPEKE patent.

2005-11-09 Thread William Arbaugh
You may want to look at EAP-PAX. We tried to engineer around the patent land mines in the field when we designed it. This of course doesn't mean that someone won't claim it infringes on something. We also have a proof (not yet published) of security in a random oracle model. Best, Bill