METHOD FOR VALIDATING ID IN RFID

PROBLEM TO BE SOLVED: To provide a system that stores ID data as a large amount as possible in an ID information area in RFID, and validates the ID while minimizing an overall increase in memory space of an RFID chip. SOLUTION: A modification detection code to be used for validating ID information is not stored in an ID information area but in a control information area prepared for congestion control and the like, to increase the rate of occupancy of an ID in the ID information area, and the modification detection code in the control information area is employed to validate the ID information. The modification detection code in the control information area is also used as data for congestion control, to suppress an overall increase in memory space of the chip. COPYRIGHT: (C)2011,JPO&INPIT