摘要： 无线射频识别(RFID)对后端数据库的搜索效率低，且读写器的移动性差。针对该问题，基于ElGamal重加密算法，提出一种读写器可离线工作的RFID安全协议，利用GNY逻辑证明该协议的安全性。理论分析结果表明，其能抵抗重传攻击、去同步化攻击、假冒攻击、针对标签的隐私攻击，减少后端数据库的搜索次数，降低Hash计算量，提高执行效率。

关键词: 无线射频识别, 认证协议, ElGamal算法, Hash函数, GNY逻辑

Abstract: Aiming at the low efficiency of searching back-end data base and the poor mobility of reader in the existing Radio Frequency Identification(RFID) protocols, this paper proposes a new RFID protocol with ElGamal re-encryption algorithm, and uses GNY logic to prove security analysis of the new protocol by using the GNY logic shows that it is secure against the attacks such as retransmission, desynchronization, and impersonation, and it can resist the privacy attack on the tag. As both the number of searching back-end data base and the computational quantities of Hash algorithm in the new protocol are reduced, the new protocol is of high efficiency.

Key words: Radio Frequency Identification(RFID), authentication protocol, ElGamal algorithm, Hash function, GNY logic

中图分类号: 

• TP391