Security communication model for vehicular clouds based on trusted computing

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 algorithm, which used the random number, key and time stamp effectively. The key and the hash function 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 credibility, security, anonymity, and the characteristics of the resistance to attack.