School of Information Science and Engineering, Central South University, Changsha 410006, China.
School of Computer Science and Information Security, Guilin University Of Electronic Technology, Guilin 541004, China.
Sensors (Basel). 2019 Jan 24;19(3):482. doi: 10.3390/s19030482.
A vehicular ad hoc network (VANET) is a special mobile ad hoc network that provides vehicle collaborative security applications using intervehicle communication technology. The method enables vehicles to exchange information (e.g., emergency brake). In VANET, there are many vehicle platoon driving scenes, where vehicles with identical attributes (location, organization, etc.) are organized as a group. However, this organization causes the issue of security threats (message confidentiality, identity privacy, etc.) because of an unsafe wireless communication channel. To protect the security and privacy of group communication, it is necessary to design an effective group key agreement scheme. By negotiating a dynamic session secret key using a fixed roadside unit (RSU), which has stronger computational ability than the on-board unit (OBU) equipped on the vehicle, the designed scheme can help to provide more stable communication performance and speed up the encryption and decryption processes. To effectively implement the anonymous authentication mechanism and authentication efficiency, we use a batch authentication scheme and a shared secret key mechanism among the vehicles, RSUs and trusted authority (TA). We design an efficient group secret key agreement scheme, which satisfies the above communication and security requirements, protects the privacy of vehicles, and traces the real identity of the vehicle at a time when it is necessary. Computational analysis shows that the proposed scheme is secure and more efficient than existing schemes.
车对车自组网（VANET）是一种特殊的移动自组网，利用车对车通信技术为车辆协作安全应用提供服务。该方法使车辆能够交换信息（例如，紧急制动）。在 VANET 中，存在许多车辆编队驾驶场景，其中具有相同属性（位置、组织等）的车辆被组织成一个组。然而，这种组织方式会导致安全威胁（消息机密性、身份隐私等）问题，因为无线通信信道不安全。为了保护组通信的安全和隐私，需要设计有效的组密钥协商方案。通过使用具有比车载单元（OBU）更强计算能力的固定路边单元（RSU）协商动态会话密钥，可以为车辆提供更稳定的通信性能，并加快加密和解密过程。为了有效地实现匿名认证机制和认证效率，我们在车辆、RSU 和可信权威机构（TA）之间使用批量认证方案和共享密钥机制。我们设计了一种高效的组密钥协商方案，该方案满足上述通信和安全要求，保护了车辆的隐私，并在需要时可以追踪车辆的真实身份。计算分析表明，所提出的方案是安全的，并且比现有方案更高效。
