Method of securely loading commands in a smart card
CA 2245921 A1 · Owner: Drupsteen, Michel Marco Paul · Inventors: 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 relates to a method of securely loading and validating commands (COM) in a smart card (SC). Especially in the case where application-specific commands are loaded by an application provider (AP) that is off-line with , respect to the card issuer (CI) it must be ensured that the commands are valid. The invention provides a method involving the protection of the commands (COM) by means of authentication codes these codes (MAC1, MAC2) , being produced using two different keys: one key (K1) is stored by the card issuer (CI), the other (K2) by a trusted third party (TTP). A further authentication code (MAC3), produced using a key from a set of keys (K3*) may , be utilized to …
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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 25, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 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.