Cryptology ePrint Archive: Report 2013/517

Improvement of One Adaptive Oblivious Transfer Scheme

Zhengjun Cao and Lihua Liu

Abstract: In 2011, the authors [8] presented an adaptive oblivious transfer (OT) scheme based on Decisional 3-Party Diffie-Hellman (3DDH) assumption. The encryption used in the scheme is a combination of the Boneh-Boyen IBE scheme and a variation of the Hohenberger-Waters signature. The scheme is somewhat inefficient since it combines the two underlying schemes in a simple way. In this paper, we present an improvement of the OT scheme and show its security under 3DDH assumption. The proposed skills are helpful for designing and analyzing other cryptographic schemes.

Category / Keywords: cryptographic protocols / adaptive oblivious transfer; 3-Party Diffie-Hellman assumption; redundant system parameters.

Date: received 19 Aug 2013

Contact author: liulh at shmtu edu cn

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Version: 20130821:012211 (All versions of this report)

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