Cryptographic comparison of selections from small ranges
CA 2405896 C · Owner: Koninklijke Kpn N.V. · Inventors: Gelbord, Boaz Simon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method for comparing selections of two respective parties from a predetermined range comprising the steps of selecting a range of values selecting at least , one committed value (x y) of said range by a sending party, composing a commitment message by each party, including control numbers corresponding respectively with each one value of said range oblivious transfer by each , party of its commitment message to the other party and verification by the , receiving party of said received commitment message including checking of the presence of at least one committed value.
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 May 21, 2001 and granted July 12, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 21, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 21, 2023.
- 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.