Vehicular ad hoc networks (VANETs) plays an important role in smart transportation to reduce the driver's risk of having an accident and offer many entertainment facilities services. However, since the nature of open communication for VANETs, the messages broadcasted by vehicle are easily suffer from security attacks. Recently, many schemes have been proposed to address the aforesaid problems for VANETs, however most of them have huge computational and communication overhead. In this paper, we propose a secure mutual authentication scheme with privacy preservation to address the aforesaid challenges existing in VANETs. Firstly, before the vehicle broadcasts messages to other vehicles, it needs to execute mutual authentication process between TA and the vehicle to ensure that any attacker could not enter the range of communication to broadcast fake message causes damage. Secondly, before the attacker acquires the information (such as internal pseudo-identity and encryption key) stored in the tamper proof device via the side-channel attack, these information have been updated, so the side-channel attack could be resisted. Finally, because the bilinear pairing is not used in our scheme, the system cost is lower than other schemes during the performance evaluation. Therefore, our scheme is more suitable for the large scale VANETs.

车载自组织网络（VANET）在智能交通中起着重要作用，以降低驾驶员发生事故的风险并提供许多娱乐设施服务。但是，由于VANET开放通信的本质，车辆广播的消息很容易遭受安全攻击。近来，已经提出了许多方案来解决VANET的上述问题，但是它们大多数具有巨大的计算和通信开销。在本文中，我们提出了一种具有隐私保护的安全双向身份验证方案，以解决VANET中存在的上述挑战。首先，在车辆向其他车辆广播消息之前，它需要在TA和车辆之间执行相互身份验证过程，以确保任何攻击者都无法进入通信范围以传播伪造消息而造成破坏。其次，在攻击者通过边路攻击获取防篡改设备中存储的信息（例如内部伪身份和加密密钥）之前，这些信息已经更新，因此可以抵抗边路攻击。最后，由于在我们的方案中未使用双线性配对，因此在性能评估期间，系统成本低于其他方案。因此，我们的方案更适合于大型VANET。这些信息已更新，因此可以抵御旁道攻击。最后，由于在我们的方案中未使用双线性配对，因此在性能评估期间，系统成本低于其他方案。因此，我们的方案更适合于大型VANET。这些信息已更新，因此可以抵御旁道攻击。最后，由于在我们的方案中未使用双线性配对，因此在性能评估期间，系统成本低于其他方案。因此，我们的方案更适合于大型VANET。