No abstract

Pervasive social networking (PSN) is facilitating and enriching people's lives at any time and in any places with the heterogeneous networks. One of the most important issues in PSN is its security and privacy, since users hope their privacy not be disclosed in social activities. Trust relationship plays a crucial role in PSN system, and can be utilized to support trustworthy PSN system with anonymous authentication. Thus, this paper propose AnonyTtrust, an anonymous trust authentication scheme to authenticate identities and trust levels of users with privacy preservation. It also achieves conditional traceability with a trusted server (TS), as well as online and offline state switching with multiple authorized access points (APs). The security analysis, and performance evaluation of the scheme show that the scheme is efficient regarding to security, privacy preservation, computational complexity, and communication cost. In order to test the feasibility of the proposed scheme, a lightweight secret chat application called AnonyChat is developed in practice. The results show that AnonyChat performs well and efficiently in the Android system.