Privacy protection protocol in pervasive computing

In order to preserve the privacy of users, an improved secure protocol in pervasive computing is presented in this paper. With this privacy protection protocol, it allows the users to accomplish the tasks by communicating with service discoverers, instead of with service providers directly. By the security analysis of the proposed protocol, it validated that this protocol can availably protect the privacy of the users and prevent them being tracked, and significantly reduce the computational complexity compared with the existing protocol. Based on the analysis result, this improved protocol is able to protect the users´ privacy and to resist replay attack more effectively.