Construction of a Privacy Preserving Mobile Social Networking Service

The social-network application comes on, as the smart phone has come into wide use. The Social Network Service is making huge effect to the new relationship among the people. With this new wave, the development of the social-network application which is based on the smart phone is activated. Some of the social network application including the service, allow users to search other users who is close to the current location, for example, “WhosHere” of iPhone. These applications provides user checker which is based on the information of the other users such as age, gender, interest. However, this method demands the congruity of the information, i.e., the information of the searcher and the surveyee must perfectly match. Improving this aspect, in this paper, we propose a method to enhance privacy of social networking service, while preserving its original objective as a social hub. The proposed method is based on fuzzy vault scheme; the main contribution of our scheme is that the matching ratio that sets the degree of information correlation is variable and can be set by user.