A system and method for securing a Radio Frequency (RF) transaction using a Radio Frequency Identification (RFID) transaction device are provided. A random number is transmitted from an RFID reader to an RFID transaction device, an RFID transaction device authentication tag is created in the RFID transaction...http://www.google.com/patents/US7312707?utm_source=gb-gplus-sharePatent US7312707 - System and method for authenticating a RF transaction using a transaction account routing number
