Method of securely modifying data on a smart card
CA 2245944 A1 · Owner: Koninklijke Ptt Nederland N.V. · Inventors: Muller, Frank; Drupsteen, Michel Marco Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention pertains to a method of securely transferring data such as , program data, to a smart card (1). In order to be applicable in non-secure environments, the method of the invention involves a one-way authentication mechanism, comprising the use of a series of interrelated authentication values, (R0, R1, R2, ...). Further security is achieved by using commands (INIT, TRAN) which are each provided with an authentication code (MAC0 MAC1, ...). In order to transfer data only to selected cards the card may accept , transfer commands only if a card profile (CP) matches a distribution profile (DP).
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 March 7, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2019.
- 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.