基于权重的差值化多轮投票车载自组织网络位置验证机制

Multi-round vote location verification mechanism based on weight and difference value in vehicular Ad Hoc network

针对车载自组织网络(VANET)位置验证的共谋攻击问题,提出了一种基于权重的差值化多轮投票位置验证机制。该机制通过引入静态帧以及重新设计信标帧(Beacon)消息格式缓解位置验证延时,并设置恶意车辆过滤环节,使得具有不同信任度的邻居对特定区域中的位置进行基于权重的多轮投票,以获得可信的位置验证。实验结果表明,在位置验证算法的正确率方面,多个恶意车辆发起合谋攻击时该机制算法的正确率仍能达到93.4%,与基于最小均方误差(MMSE)的位置验证方案相比,能获得更高的检测率。

To solve the problem of location verification caused by collusion attack in Vehicular Ad Hoc NETworks （VANET）, a multi-round vote location verification based on weight and difference was proposed. In the mechanism, a static frame was introduced and the Beacon message＇s format was redesigned to alleviate the time delay of location verification. By setting malicious vehicles filtering process, the position of the specific region was voted by the neighbors with different degrees of trust, which could obtain credible position verification. The experimental results illustrate that in the case of collusion attack, the scheme achieves a higher accuracy of 93.4% compared to Minimum Mean Square Estimation （MMSE） based location verification mechanism.