Parallel rational world based privacy preservation mechanism for group privacy

With the rapid development of social network and information technology, people enjoy the happy and convenient life the modern world brings. On the other hand, people suffer risk caused by privacy leakage. How to protect peoples' privacy in such an information society is a still a challenge and hot issue. It is difficult to find an excellent best of both worlds solution to protect people's sensitive information while providing people the convenient and appropriate services. Aiming at this issue, the group sensitive information is the focus of research in this paper. Parallel rational world based privacy preservation mechanism is proposed to make confuse with the true sensitive value or trend. Analysis and simulation demonstrate that the group privacy preservation mechanism is effective.