无滥用的三方合同签署协议

针对目前三方合同签署协议中安全性与效率性的问题,利用可验证加密的变色龙签名(verifiable encryption of chameleon signatures,VECS)技术,设计了一个高效的无滥用的三方合同签署协议。理论分析结果表明,该协议同时满足完整性、公平性、无滥用性、可追究性、第三方 (TTP) 的不可见性和TTP合同保密性。而且与以前的三方合同签署协议相比,所设计的协议减少了合同签署方之间交互的轮数及发送消息的数量,因此效率更高。

Abuse-free three-party contract singing protocol

In order to solve the problems of security and efficiency in three-party contract singing protocols,an efficient abuse-free three-party contract singing protocol was proposed by using the notion of Verifiable Encryption of Chameleon Signatures(VECS).Theoretical analysis show that the protocol enjoys the properties of completeness,fairness,abuse-freeness,accountability,invisibility of the third party and the distinguishing property of everlasting secrecy about the contract against the third party.Besides,the proposed protocol decreases the interaction round and number of the message among the parties,and thus is more efficient than the existing protocols.