In order to resolve the safety problem in vehicular ad hoc networks ( VANET) , an efficient rnprivacy-preserving scheme was proposed for VANET message authentication, which is based on the rnbilinear pairing technique for large-scale group communication and synthetically considers the actual rnsituation of the VANET according to digital signature principles. In the scheme, vehicles are classified rninto private ones and public ones. The messages from private vehicles are verified by group signature,rnand those from public vehicles and roadside units ( RSU) by identity-based signature. Furthermore,rnbatch technique is introduced to accelerate the verification of accumulated messages, and quantitative rncomparison and determination is employed to handle the conflicting information. As a result, the rninformation authentication efficiency is improved by about 33％, in comparison to that of the rnconventional schemes. Finally, an experimental simulation was conducted to confirm the efficiency of rnthe proposed scheme in vanous application scenarios. The results show that the scheme is robust and rnscalable , and meets the requests of VANET.%为了解决车载通信网中的信息安全问题,根据数字签名原理,综合考虑车载通信网实际状况,基于适合大规模群体的双线性对技术,提出快速高效并具有隐私保护功能的信息认证方案,把车辆分成私家车辆和公用车辆,分别采用群签名和基于身份签名的方法对相应信息进行认证,并引入积聚信息批量验证和矛盾信息量化对比确认技术,使车载通信网中信息认证效率比现有方案提高33%以上.仿真结果表明,信息认证的效率与预期分析符合,具有较强的鲁棒性和可扩充性,能够满足车载通信网的运行需求.
展开▼
