منابع مشابه
Restricted adaptive oblivious transfer
In this work we consider the following primitive, that we call restricted adaptive oblivious transfer. On the one hand, the owner of a database wants to restrict the access of users to this data according to some policy, in such a way that a user can only obtain information satisfying the restrictions imposed by the owner. On the other hand, a legitimate user wants to privately retrieve allowed...
متن کاملAn Efficient Protocol for Restricted Adaptive Oblivious Transfer
Restricted adaptive oblivious transfer was introduced by Herranz in 2011, which is the main approach to protect user privacy in e-transactions involving operations on digital confidential data or sensitive information. There are many practical applications for restricted adaptive oblivious transfer, such as medical or financial data access, pay-per-view TV, and so on. However, so far as we know...
متن کاملSimulatable Adaptive Oblivious Transfer
We study an adaptive variant of oblivious transfer in which a sender has N messages, of which a receiver can adaptively choose to receive k one-after-the-other, in such a way that (a) the sender learns nothing about the receiver’s selections, and (b) the receiver only learns about the k requested messages. We propose two practical protocols for this primitive that achieve a stronger security no...
متن کاملUniversally Composable Adaptive Oblivious Transfer
In an oblivious transfer (OT) protocol, a Sender with messages M1, . . . ,MN and a Receiver with indices σ1, . . . , σk ∈ [1, N ] interact in such a way that at the end the Receiver obtains Mσ1 , . . . ,Mσk without learning anything about the other messages and the Sender does not learn anything about σ1, . . . , σk. In an adaptive protocol, the Receiver may obtain Mσi−1 before deciding on σi. ...
متن کاملAdaptive Oblivious Transfer and Generalization
Oblivious Transfer (OT) protocols were introduced in the seminal paper of Rabin, and allow a user to retrieve a given number of lines (usually one) in a database, without revealing which ones to the server. The server is ensured that only this given number of lines can be accessed per interaction, and so the others are protected; while the user is ensured that the server does not learn the numb...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 2011
ISSN: 0304-3975
DOI: 10.1016/j.tcs.2011.06.023