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Journal of Lanzhou University

New verifiable encryptions and their applications

Caifen Wang

Published Jan 1, 2002• 0 citations
OpenAlex

Abstract

As more and more electronic transactions are being conducted on the IN TERNET, fair exchange protocol is becoming more and more important. Verifiable e ncryption is introduced as a primitive that can be used to build extremely effic ient fair exchange protocols where the items exchanged represent digital signat ures. In this paper, new verifiable encryption schemes are presented, and based on this scheme, a blinded verifiable encryption is presented. They are advantage ous over previous schemes in that they are more efficient and practical.

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As more and more electronic transactions are being conducted on the IN TERNET, fair exchange protocol is becoming more and more important. Verifiable e ncryption is introduced as a primitive that can be used to build extremely effic ient fair exchange protocols where the items exchanged represent digital signat ures. In this paper, new verifiable encryption schemes are presented, and based on this scheme, a blinded verifiable encryption is presented. They are advantage ous over previous schemes in that they are more efficient and practical.
Based on the verifiably encrypted signature scheme without random oracles recently proposed by Gorantla et al.,a new scheme of optimistic fair exchange of digital signatures is proposed in this paper.The two players firstly exchange their verifiably encrypted signature on agreed-upon messages then their ordinary signature after the verification of each other's verifiably encrypted signature.If one of them executes the protocol dishonestly,the other can resort to a trusted third party so as to get the purpose of fair exchange of signatures.The proposed scheme has properties of short signature,low computation and verification cost.It can realize exchange of digital signatures fairly and efficiently.