基于可信计算的车联网云安全通信模型

Security communication model for vehicular clouds based on trusted computing

基于可信计算思想提出了一个车联网云平台用户间的安全通信模型.该模型借助可信第三方,在申请通信服务过程中为车联网云用户生成临时身份,即对车联网云用户身份进行匿名化处理,以实现对用户身份隐私的保护.在通信过程中,该模型采用双线性对签名的算法分别对用户的身份合法性和平台可信性进行认证,并有效地使用了随机数、密钥和时间戳,以密钥和散列函数确保了签名的不可伪造性,以时间戳确保了密钥的时效性,以随机数机制防止了重放攻击.分析结果表明:在车联网云平台中采用该通信模型可以使通信过程具备可信性、安全性和匿名性.

An security communication model for vehicular clouds (VC) based on trusted computing was proposed .With the help of a trusted third party ,at the beginning of communications services process ,the model generated a temporary identity for VC users ,namely to anonymize the identity of these users in order to protect user′s privacy .And then ,during the communication process ,the user′s identity legitimacy and credibility authentication were verified with the bilinear pairings signature al-gorithm ,which used the random number ,key and time stamp effectively .The key and the hash func-tion ensure the signature to be unforgeable ,the timestamp ensures that the key is valid during a limit period ,and the random number prevents replay attacks .Analysis shows that this model has the credi-bility ,security ,anonymity ,and the characteristics of the resistance to attack .