Method and structure for challenge-response signatures and high-performance secure diffie-hellman protocols
CA 2596500 C · Owner: International Business Machines Corporation · Inventors: Krawczyk, Hugo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The application presents HMQV, a variant of the MQV authenticated Diffie- Hellman protocol . It provides the same performance and functionality of the original protocol but its security goals can be formally proved to hold. HMQV- A "hashed variant" of MQV - is designed on the basis of a new "challengeresponse signature" scheme.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 10, 2006 and granted March 25, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.