Patent ID: 7357318

Claim:
A radio frequency identification (RFID) tag access authentication system comprising: a data processing terminal, a memory medium, and an RFID tag, wherein said data processing terminal comprises: an input unit by which a first identification data is inputted to said data processing terminal, a first data processing unit which generates a request signal for requesting a first key data, a first communication unit which transmits said request signal to said memory medium, a second communication unit which transmits said first identification data and said first key data received from said memory medium to said RFID tag, and wherein said first data processing unit accesses said RFID tag in response to receiving an access authentication data from said RFID tag, wherein said memory medium comprises: a first memory unit which stores said first key data, and a third communication unit which transmits said first key data in said first memory unit to said data processing terminal in response to said request signal, and wherein said RFID tag comprises: a second memory unit which stores a second identification data and a second key data corresponding to said second identification data, a second data processing unit which compares a first data set comprising said first identification data and said first key data with a second data set comprising said second identification data and said second key data in said second memory unit, and generates said access authentication data when said first data set agrees with said second data set, and a fourth communication unit which transmits said access authentication data to said data processing terminal.