Abstract:

Since the security privacy issues of RFID systems are increasingly prominent, we propose a RFID mutualauthentication protocol based on chaotic sequence encryption to tackle those problems. Chaotic sequence can be generated to encrypt the keys by making full use of the sensitivity of chaos to the initial value. An update mechanism of the dynamic tag keys is introduced and a selfsynchronized scheme is designed, which achieves a second verification for the tags. The security of the protocol is verified by the BAN logic, and it is compared with the existing schemes in terms of security and performance. The results show that the proposed protocol can greatly decrease the cost of tags, reduce the amount of computation of tags and the backend database, and enhance the search efficiency of the backend database. It can not only effectively solve the privacy and security issues of the RFID system, but also improve the efficiency of the RFID system, thus being more suitable for the low cost RFID system.

Key words: RFID;authentication protocol;chaotic;privacy protection;BAN logic