The Research Of ID-based Signature

Abstract:Information society is being pushed onto a new advanced level by computer network and communication technologies, which have made great effects on government , military affairs, culture education ,and finance, etc. In a large number of network storage and transmission of date in need of protection ,such as personal medical records, credit card account numbers ,passwords landing network, or corporate strategy report, forecast sales, technical details Canbing, research, personal files, and so on. These date may be stolen, exposed, tampering, and forgery in the process of storage and transmission .As the network environment and network information resource in our society ,information security is one of the rising subjects in information science and its core of technology is cryptology . In cryptological area , public key cryptosystem because of its unmatched advantages compared with the traditional cryptosystem, especially in key management ,is playing an increasingly important role. As a new branch of public key cryptosystem ,digital signature is a key technology of the secure B2B(Business to Business) and government affair in recent years.Digital signature ,which can Provide authentication , Integrity and non-repudiation is a key technique of information security. Compared with the Certificated Authority based (CA-based) cryptography , Identity (ID-based) signature can simplify the key management procedure from the view point of the efficiency and convenience. Identity-based signature using paring technology on elliptical curves has become one of the pop research problems.The main research of this thesis for identity-based signature in public-key cryptography includes identity-based proxy signature and blind signature.1.This thesis analyses and sums up scheme of existing identity-based signature, discusses the security and efficiency of some typical ones and finally points out the existing issues and developing trends of present identity-based digital signature. Propose a new id-based signature scheme. It solve the problem of key escrow.2.A new identity-based proxy signature scheme is advanced .After discussing on its security and efficiency ,this new scheme is proved to be strong unforgettable and undeniable with comparison with other schemes.3.Analysing identity-based blind signature schemes and propose the construction process of identity - based blind signature. proposing a new ID-based blind signature. and a new ID-based proxy and blind signature is proposed.