车载自组网中信任感知的隐私保护策略

摘要

车载自组网中的信任管理系统要求用户的声誉相关信息充分公开,这会给用户隐私带来隐患.为解决信任与隐私的冲突问题,提出"假名-声誉值"协同变换策略.新策略以k匿名隐私保护理论和用户中心策略为基础,同时考虑了用户个性化隐私保护需求,提出了PK-PCS策略.仿真实验表明PK-PCS策略在车辆隐私保护、满意度、数据损失方面整体优于现有PCS策略和K-PCS策略.PK-PCS既保持了信任的有用性,又同时保护了用户隐私.%The trust management systems in Vehicular Ad-hoc Networks(VANETs)require users to disclose their reputa-tion-related information,which will bring dangers to user privacy.To deal with the collusion between trust and privacy,a novel"pseudonym-reputation"collaborative change scheme is presented in this paper.This scheme is based on the k-anonymity theory and user-centric strategy.The personalized privacy protection is considered and a PK-PCS strategy is presented. Experiments show that the PK-PCS strategy is better than the traditional Pseudonym Change Strategy(PCS) strategy and K-anonymity Pseudonym Change Strategy(K-PCS)strategy in privacy preservation, satisfaction and data loss.The PK-PCS not only maintains the usefulness of trust,but also protects the privacy of users.