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Many proximity-based mobile social networks are developed to facilitate connections between any two people, or to help a user to find people with a matched profile within a certain distance. A challenging task in these applications is to protect the privacy of the participants' profiles and communications. In this paper, we design novel mechanisms, when given a preference-profile submitted by a user, that search persons with matchingprofile in decentralized mobile social networks. Meanwhile,doi:10.1109/tmc.2014.2366773 fatcat:dxfkhvg76vcbfhvwr6z2xbtbla