基于數(shù)字簽名的增強(qiáng)的不經(jīng)意傳輸協(xié)議
Signature-Based Enhanced Oblivious Transfer
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摘要: 該文在離散對(duì)數(shù)類(lèi)數(shù)字簽名及關(guān)于數(shù)據(jù)串的不經(jīng)意傳輸?shù)幕A(chǔ)上提出了一種增強(qiáng)的不經(jīng)意傳輸協(xié)議，解決了一種不經(jīng)意傳輸?shù)慕尤肟刂茊?wèn)題。除了具備一般不經(jīng)意傳輸協(xié)議的特征外，該方案具有如下特點(diǎn)：只有持有權(quán)威機(jī)構(gòu)發(fā)放的簽字的接收者才能打開(kāi)密文而且發(fā)送者不能確定接收者是否持有簽字，即不能確定接受者的身份。在DDH( Decisional Diffie-Hellman)假設(shè)和隨機(jī)預(yù)言模型下該文所提協(xié)議具有可證明的安全性。Abstract: Based on Schnorr (Elgamal) signature and (string) oblivious transfer, an enhanced oblivious transfer protocol is proposed which solved the access control problem for an oblivious transfer protocol. The protocol proposed has the property: the only receiver who has the signature issued by the central authority can open the message which he chose; the sender can not decide whether the receiver has the signature or not. That is the identity of the receiver can not be confirmed after the protocol. Under the Decisional Diffie-Hellman(DDH) assumption the proposed scheme has provable security.
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Rabin M. How to exchange secrets by oblivious transferTechnical Report TR-81, Aiken Computation Laboratory, Harvard Univ., 1981.[2]Li Ninghui, Du Wenliang, Boneh Dan. Oblivious signature-based envelope. In Proceedings of the 22nd ACM Symposium on Principles of Distributed Computing (PODC 2003), Boston, Massachusetts, July 2003, New York, ACM Press, 2003: 182-189.[3]Tzeng W G. Efficient 1-out-of-n oblivious transfer schemes with universally usable parameters[J].. IEEE Trans. on Computers.2004, 53(2):232-240[4]Schnorr C.Efficient identification and signature for smart cards.In:Advances in Cryptology-Crypto'89,volume 435 of Lecture Notes in Computer Science,Berlin,Springer-Verlag,1990:235-251.[5]ElGamal T.A public-key cryptosystem and a signature scheme based on discrete logarithms[J].IEEE Trans.on Information Theory.1985,31(4):469-472 -
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