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The recent proliferation of human-carried mobile devices has given rise to the mobile crowd sensing (MCS) systems. However, the sensory data provided by the participating workers are usually not reliable. As an efficient technique to extract truthful information from unreliable data, truth discovery has drawn significant attention. Currently, the privacy concern of the participating workers poses...
Proxy re-signature is an important cryptographic primitive in which a semi-trusted proxy is able to transform a delegatee's signature on some message into a delegator's signature on the same message, while the proxy itself cannot generate any signatures for either the delegatee or the delegator. The existing proxy re-signature schemes in the literature all rely on the hardness assumptions that can...
Truthful spectrum auctions have been extensively studied in recent years. Truthfulness makes bidders bid their true valuations, simplifying greatly the analysis of auctions. However, revealing one's true valuation causes severe privacy disclosure to the auctioneer and other bidders. To make things worse, previous work on secure spectrum auctions does not provide adequate security. In this paper, based...
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