The Analysis, Design And Application Of Certificateless Digital Signature

As computer network technology is developing fast and fast, network servicebecomes more and more important to people’s daily life and work. While people areenjoying the convenience brought by the advanced information technology, theirprivate information is also being threatened. Therefore, it’s important to ensure thesecurity of information’s transmission on the network, which makes it possible bycryptography. Digital signature as an important technology in cryptography, guaranteessafe network activities. That’s why for a long time digital signature technology is aresearch focus on the field of information security.Certificateless public key cryptography system solves the management problemof traditional public-key cryptosystem certificate, and it also avoids key escrow issuesof identity-based public-key cryptography. Therefore it is highly valuable in theory andpractice to analyze certificateless public key cryptography system of digital signaturetechnology. This article mainly pays attention to certificateless digital signature andspecial digital signature, while referring to its applications. The layout of this article asfollow.Firstly， a brief introduction is given to certificateless public key cryptographysystem and certificateless digital signature, then analyzed the existing digital signaturescheme without a certificate, and discussed.Secondly, an analysis of certificateless proxy blind signature schemes is given,showing the existence of forged attacks in the scheme and the dissatisfaction onun-linkability, which means the proxy signer can link the public signature with theinformation retained by him. There also provides an improved signature scheme.Thirdly, this article also studies certificateless group signature schemes. Byapplying dynamic accumulator to the group signature, a more efficient idea ofconstructing dynamic group signature on dynamic accumulator is proposed.At last, according to actual needs for E-Commerce, an electronic cash systembased on certificateless proxy blind signature scheme is designed, which has a goodapplication.