车联网安全消息传输的安全性研究

Study on Security of Transmitting Safety Message for VANETs

在车联网(Vehicular Ad Hoc Networks,VANETs)中,车辆通过周期地广播安全消息,提高了交通安全。然而,利用开放的无线媒介传输安全消息,导致安全消息容易遭受多类安全攻击。一旦安全消息遭受攻击,不仅影响VANETs的安全性,也泄露了用户的隐私。为此,提出基于哈希消息鉴别码(Hash message authentication code,HMAC)的安全消息认证方案(HMAC-based safety message authentication,HMAC-SMA)。HMAC-SMA方案采用非对称的基于身份加密,并引用别名对安全消息进行签名,保护用户隐私。引用HMAC对安全消息进行认证,提高安全消息的安全性。仿真结果表明,HMAC-SMA方案能够满足VANETs的安全隐私要求。

In vehicular ad hoc networks( VANETs),each vehicle periodically broadcasts safety messages in order to provide safety. However,safety messages are broadcasted through an open wireless medium,it is vulnerable to diverse kinds of security attacks. Once safety message is attacked,it damages the security of VANETs,and reveals the privacy of users. Therefore,HMAC-based safety message authentication(HMAC-SMA) is proposed in this paper. HMAC-SMA adopts asymmetric identity-based cryptography,and signed the safety message by pseudonym. Then safety message is authenticated by HMAC,which improve the security of safety message. Simulation results indicate that HMAC-SMA scheme could satisfy privacy and security requirements.