A device driver (104) is used to provide a fail-safe interface between a plurality of client applications and a cryptographic card. Device driver (104) ensures separation between red data, black data, and command data. Device driver (104) uses objects and object handles to control data flow. Device driver...http://www.google.fr/patents/US5946399?utm_source=gb-gplus-shareBrevet US5946399 - Fail-safe device driver and method
