Data updating method and data updating system
CA 2428254 A1 · Owner: Systemneeds Inc. · Inventors: Nakayama, Keisuke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a data updating method and a data updating system which can update data of an IC card through a network without mistaking the IC card targeted for updating. When each of issuer client authentication, personal authentication issuer server, authentication and device authentication is performed a, server transmits update data encrypted by a public key used for the device authentication to a client. Then the client, outputs the encrypted update data to an IC card. In the IC card, the update data is decrypted by a secret key used for the device authentication. Based on the decrypted update data, rewriting is carried out in the IC card.
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 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2025.
- 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.