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Abstract: Databases are an indispensable resource for retrieving up-to-dateinformation. However, curious database operators may be able to find out theusers- interests when the users buy something from the database. For thesecases, if the digital goods have the identical prices, then a $k$-out-of-$n$oblivious transfer protocol could help the users to hide their choices, butwhen the goods have different prices, this would not work. In this paper, wepropose a scheme to help users to keep their choices secret when buying priceddigital goods from databases.



Author: Xi Li

Source: https://arxiv.org/







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