随着电动汽车(Electric vehicle,EV)的发展,V2V(Vehicle-to-vehicle)电力交易作为一种灵活充电模式具有广阔的发展前景.EV用户在进行V2V电力交易时,其通信是在无线网络中进行的,消息容易被窃听或伪造,这可能会造成用户隐私泄露,进而破坏交易的公平性.为此,提出了一种具有隐私保护且可追踪用户身份的V2V电力交易安全通信方案.首先,用户通过使用伪身份来进行交易以防止其真实身份泄露;当用户发生违约行为时,根据违约用户的伪身份可以追踪到其真实身份.其次,设计了一种无证书聚合签密算法来保证V2V电力交易中的通信安全.该算法实现了对消息的签名和加密,保证了消息的认证性和机密性.理论分析结果证明,该方案能够有效保护用户隐私,同时能实现安全通信;性能分析结果表明,相比于现有方案,该方案具有较低的通信开销和计算开销.
With the development of electric vehicle(EV),V2V(Vehicle-to-vehicle)power transactions as a flexible charging mode has a broad prospect.When EV users conduct V2V power transactions,its communication is in a wireless network,and the message is easy to be eavesdropped or forged,which may result in the leakage of user privacy,thus undermine the fairness of the transaction.Therefore,a secure communication scheme for V2V power transaction with privacy protection and user identity traceability is proposed.Firstly,users use fake identities to conduct transactions to prevent their real identities from being revealed;when a user defaults,the user's real identity can be traced based on the defaulting user's fake identity.Secondly,a certificateless aggregate signcryption algorithm is designed to ensure security of communication in V2V power transactions.The algorithm realizes the signature and encryption of the message,and ensures the authentication and confidentiality of the message.The theoretical analysis results show that the scheme can protect user privacy and achieve secure communication,and performance analysis results show that the scheme has low communication overhead and computation overhead compared with existing schemes.