ENCRYPTION FOR MODULATED BACKSCATTER SYSTEMS

摘要

The present invention enables a Tag and Interrogator to exchange proprietary information using Modulated BackScatter (MBS) technology. This invention discloses a method for encrypting the RFID user's PIN and thereby making the interception and the subsequent illegal use of RFID accounts at l east as difficult as a present day ATM cards. For example, the encryption method can be based upon the US Digital Encryption Standard (DES), either first or third l evel. The Tag's personal encryption key is only known by the financial database an d the RFID Tag. This method can be applied to any type of financial, debt, identif ication, or credit card.