Generic Fully Simulatable Adaptive Oblivious Transfer
نویسندگان
چکیده
منابع مشابه
Generic Fully Simulatable Adaptive Oblivious Transfer
We aim at constructing adaptive oblivious transfer protocols, enjoying fully simulatable security, from various well-known assumptions such as DDH, d-Linear, QR, DCR, and LWE. To this end, we present two generic constructions of adaptive OT, one of which utilizes verifiable shuffles together with threshold decryption schemes, while the other uses permutation networks together with what we call ...
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Oblivious transfer, first introduced by Rabin, is one of the basic building blocks of cryptographic protocols. In an oblivious transfer (or more exactly, in its 1-out-of-2 variant), one party known as the sender has a pair of messages and the other party known as the receiver obtains one of them. Somewhat paradoxically, the receiver obtains exactly one of the messages (and learns nothing of the...
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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...
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Oblivious Transfer protocol (OTP) is a primitive and also a paramount important tool in modern cryptography. An adaptive version of OTP named 1 OT N k is useful when a large database should be queried in an adaptive version. Due to its importance, the task of constructing efficient and secure 1 OT N k has attracted a lot interests. This paper presents a research roadmap to construct a practic...
متن کاملObtaining Efficient Fully Simulatable Oblivious Transfer from General Assumptions
We introduce a general construction of fully simulatable oblivious transfer based on lossy encryption. Furthermore, we extend the common definition of lossy encryption by introducing the notion of computationally lossy encryption. If the cryptosystem used is computationally lossy, our general construction yields oblivious transfer protocols with computational security for both parties. Otherwis...
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ژورنال
عنوان ژورنال: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
سال: 2015
ISSN: 0916-8508,1745-1337
DOI: 10.1587/transfun.e98.a.232