NDLI: Efficient 1-out-of-n oblivious transfer schemes with universally usable parameters

Content Provider	IEEE Xplore Digital Library
Author	Wen-Guey Tzeng
Copyright Year	1968
Abstract	We propose efficient and secure (string) oblivious transfer (OT/sup 1//sub n/) schemes for any n/spl ges/2. We build our OT/sup 1//sub n/ scheme from fundamental cryptographic techniques directly. The receiver's choice is unconditionally secure and the secrecy of the unchosen secrets is based on the hardness of the decisional Diffie-Hellman problem. Some schemes achieve optimal efficiency in terms of the number of rounds and the total number of exchanged messages for the case that the receiver's choice is unconditionally secure. The distinct feature of our scheme is that the system-wide parameters are independent of n and universally usable, that is, all possible receivers and senders use the same parameters and need no trapdoors specific to each of them. We extend our OT/sup 1//sub n/ schemes to distributed oblivious transfer schemes. Our distributed OT/sup 1//sub n/ schemes take full advantage of the research results of secret sharing. For applications, we present a method of transforming any (single-database) PIR protocol into a symmetric PIR protocol by slightly increasing the communication cost only.
Sponsorship	IEEE Computer Society Technical Committee on Distributed Process IEEE Computer Society Technical Committee on VLSI IEEE Technical Committee on Computer Architecture IEEE Computer Society
Starting Page	232
Ending Page	240
Page Count	9
File Size	1168485
File Format	PDF
ISSN	00189340
Volume Number	53
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cryptography Complexity theory Distributed computing Information retrieval
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Computational Theory and Mathematics Software Hardware and Architecture

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