NIDV Convertible Undeniable Signature Scheme

With the development of the socio-economic and the popularity of the computer network, infor-mation security has become an important research topic. As one of the core technologies of informa-tion security,the importance and practicality of digital signature are obvious. Since Diffie proposed the concept of digital signature firstly in1976,in order to meet the needs of practical application,all kinds of signature schemes have proposed and the undeniable signature scheme shall be one. Subsequently, based on security and application considerations, the domestic and foreign scholars further undeni-able signature scheme for innovation and improvement.They have proposed convertible undeniable signature, NIDV undeniable signature and other kind of undeniable signature scheme. All kinds of undeniable signatures has its own unique properties to meet different application scenarios. How to integrate the different properties of the various types of undeniable signature scheme and propose new scheme applicable to more scenarios become the focus of attention of some scholars.In this paper, on the basis of draw on the literature, the undeniable signature has been expanded further research and exploration.We have the following key findings:· We applied the thought of convertible undeniable signature scheme to NIDV undeniable signature scheme so that it can eliminate " only the designated verifier can participate in the verification" and " signer is required to provid some verify information " limit and can be converted into ordinary self-validating signatures.The new signature is called the convertible NIDV undeniable signature scheme.· Based on the modified ElGamal-like signature scheme.We proposed a conversion NIDV undeni-able signature scheme and give the security proof in the random oracle model.The new signature scheme can meet some of the needs in the practical application and the value of application was enhanced.