汽车无线钥匙安全分析及改进建议

Safety Analysis and Improvement Suggestion of Vihicle Wireless Key

汽车远程遥控系统(RKE)和无钥匙被动进入系统(PKE)是当前汽车无线钥匙的两个核心系统。RKE/PKE系统省去了人们插入钥匙进行车门开关、远程启动、车窗关闭以及报警激活等一系列动作,极大地提高了方便性。因此,重点介绍汽车无线钥匙面临的安全威胁。一方面是RKE/PKE系统的抗干扰能力差、射频信号易被无线设备捕捉重放等安全性能隐患,另一方面使RKE/PKE系统所采用的加密算法——Keeloq加密算法易被密码分析法和物理边信道攻击方法所破解的安全威胁。最后,针对汽车无线钥匙RKE/PKE系统的安全性和抗干扰性能,提出相应的改进意见。

Automotive RKE（Remote Keyless Entry） system and PKE（Passive Keyless Entry） system are currently the twocore vehicle keyless systems. With these two systems ,the users can conveniently implement locking or unlocking, make remote start, windows closing, and activate alarm of the car without inserting the key into the key hole. The paper describes the security threats against the vehicle＇s keyless system. Due the weak anti-jamming performance and the easy acquisition of RF signal, the Keeloq encryption adopted by RKE/PKE systems is easily broken by the cryptanalysis and physical side channel attack. Finally, Some suggestions for improving the security and anti-jamming performance of are RKE/PKE systems are proposed.