Data communication method and system
CA 2568797 C · Owner: Kubota, Tomoki · Inventors: Hiratsuka, Seiichi; Kubota, Tomoki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Public-key cryptography is realized by means of PKI in which biometrics data, in which biological information of users is converted to numerical values, are used to authenticate users that transmit and receive data, and based on the biometrics data identical secret keys (common , secret keys) are generated in each of the user terminal devices that are used by the users without releasing the secret keys onto the network.
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 30, 2005 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2025.
- 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.