A hardware cartridge performs the function of a verifiable, use-once authorization. The hardware cartridge is provided with physical security so that its contents are not accessible except via a specific protocol. The cartridge stores data in two or more segments. The cartridge responds to a query or...http://www.google.de/patents/US5148534?utm_source=gb-gplus-sharePatent US5148534 - Hardware cartridge representing verifiable, use-once authorization
