车载网中可抵制合谋攻击的批量认证方案

由于无线网络本身的脆弱性和开放性,车载网很容易受到各种攻击和破坏,面临着信息伪造、篡改攻击与重放攻击等安全威胁。消息认证是保障车载网安全的有效技术之一,但是车载网规模较大、涉及的通信实体数量多且移动速度非常快的特点要求消息能够被快速认证。目前,b-SPECS+是公认的最好的消息批量认证的方案,具有基于软件、通信开销小、安全性高、批量认证的特点,但是该方案不能够抵制固定路边设备和车辆的合谋攻击。基于b-SPECS+提出了一个基于假名验证公钥的批量认证方案,并证明了该方案能够很好地抵制合谋攻击。性能分析结果表明,与b-SPECS+相比,所提方案不仅具有b-SPECS+的特点,而且在认证时延方面,认证的消息越多,其相对于其他方案的耗时越短。

Batch Verification Scheme Defensing Collusive Attack in VANET

Owning to vulnerabilities and openness of the wireless networks,Vehicular ad-hoc networks (VANET) are vulnerable to attacks,such as the bogus information attack and the message replay attacks.Message authentication is one of the effective techniques to solve these problems.Obviously VANET consists of a huge number of fast moving vehicles,thus messages need to be verified rapidly.Recently,b-SPECS+ has became the best scheme on batch verification,which provids a software-based solution to satisfy the privacy requirement,gives lower message overhead and verifies message in batch.However,it suffers from the collusion attack executed by the roadside unit and the on-board unit.In this paper,we provided a pseudonymous verification public key based scheme that can solve collusion attack problem.Our solution has a higher rate than b-SPECS+ in the message verification.