A method and system for tracking and providing an audit trail for off-line smart card transactions includes storing information representing a monetary transaction in a permanent memo on an smart card microprocessor and holding the transaction amount in escrow until the stored information is transmitted...http://www.google.es/patents/US6913193?utm_source=gb-gplus-sharePatente US6913193 - Method and system of tracking and providing an audit trail of smart card transactions
Method and system of tracking and providing an audit trail of smart card ...
