| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the problem of content privacy, the problem of location privacy, and the problem of impersonation and to provide an RFID device capable of shortening a response time for a read request. <P>SOLUTION: In the RFID device for transmitting its own identifier when it receives a read request, when the RFID device stores an original identifier for uniformly identifying the RFID device and receives the write request of random numbers, it arithmetically operates a one-way function having received random numbers and original identifier as inputs, stores the result of operating the one-way function to be transmitted next time as a next-time identifier, and transmits the stored next-time identifier when the read request is received after the one-way function is arithmetically operated. <P>COPYRIGHT: (C)2009,JPO&INPIT |
