摘要： 传统的射频识别(RFID)系统在通信过程中的信息有可能被恶意用户窃听,造成保密信息外泄。为此,提出一种提高RFID系统物理层安全性能的方法。以安全容量为评价指标,分析2种不同情景:当窃听者信息可获知时,通过中继选择的方式保证通信安全,使得安全容量最大化,当窃听者信息无法获知时,采用人工干扰的方式降低窃听者能力,得到最佳的功率分配方案。仿真结果表明,该方法用极小的干扰功率能够大幅提高系统的安全容量。

关键词: 射频识别, 物理层安全, 中继选择, 人工噪声, 功率分配

Abstract: The information in the traditional Radio Frequency Identification(RFID) system during the communication process may be intercepted by malicious users,resulting in the leakage of confidential information.Therefore,a method of improving the security performance of the physical layer of RFID system is proposed.Using security capacity as an evaluation index,two different scenarios are analyzed:When eavesdropper information is known,the security of the communication is ensured through relay selection,which maximizes the security capacity,when the eavesdropper information cannot be known,manual interference is used to reduce the eavesdropper’s ability geting the best power distribution scheme.Simulation results show that this method can greatly improve the system security capacity with minimal interference power.

Key words: Radio Frequency Identification(RFID), physical layer security, relay selection, artificial noise, power allocation

中图分类号: 

• TP309