基于区域划分的车载自组织网络匿名安全广播协议

A Novel Anonymous Safety Message Broadcasting Protocol Based on Regional Division

针对车载自组织网络分布范围广、节点移动速度快、结构动态变化等特点,提出一种基于区域划分的匿名安全广播协议,并对协议的安全、效率等问题进行了分析。该方法根据地理位置、车辆密度等信息将网络划分为若干个子区域,每个区域与基站及一系列的边界设备相绑定。与以往的方法相比,车辆在进入新的子网之前,便可更新密钥,这不仅有利于效率的提高,更大大降低了车辆在区域边界所面临的安全威胁。此外,从系统性能的角度对消息的封装格式进行了设计与分析。

Due to the characteristics of wide distribution of vehicular Ad Hoc network, fast moving speed of node, dynamic change of construction and so on, an anonymous broadcast protocol based on regional division is put forward, and the safety and efficiency of protocol are analyzed. According to the geographical location, the density of vehicles and other informations, this protocol divides the network into several sub regions, and every region is bound to a fixed facility that is called base station and a series of boundary equipment. Compared with previous methods, the vehicle can get new key before entering a new subnet. It not only improves the efficien- cy, but also greatly reduces the security threats faced the border region of vehicle. In addition, the message en- capsulation format is designed and analyzed from a performance-based perspective.