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Lingling Xu, Fangguo Zhang and Shaohua Tang Timed-release oblivious transfer Security and Communication Networks 7

Article first published online: 28 AUG 2013 | DOI: 10.1002/sec.845

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We present a generic construction for timed-release oblivious transfer protocol that permits a sender to restrict when each receiver may open his chosen messages, without learning anything about the receiver's message choices. To achieve this functionality, we import a time server into the protocol that broadcasts a time token periodically and needs neither to interact with the sender nor the receiver. We also present a concrete scheme for the protocol's generic construction.

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