关键词: 认证协议, NTRU, 安全性, 哈希函数, RFID, 标签

Abstract: The RFID system has become one of the most important applications.However，this technology may suffer from some security threats，such as secrecy，location privacy，forward secrecy，replay attack，etc.A good way to provide security for RFID system is devising authentication protocol.A new mutual authentication protocol for RFID system is proposed.The authentication protocol based on public key cryptography has more security than the symmetric encryption based protocol and the hash function based protocol in RFID system.The NTRU is a more efficient public key cryptosystem，and it suits for the RFID system，so the proposed authentication protocol has adopted the NTRU public key cryptosystem.Then the security and performance of this protocol are discussed.The result shows that this protocol has provided good security for RFID system，more privacy for users，and has a nice performance.

Key words: authentication protocol, Number Theory Research Unit（NTRU）, security, Hash function, Radio Frequency IDentification（RFID）, tag