Research On Strong Forward-secure And Strong Blindness Digital Signature Technology

With the rapid development of computer networks and data communication, society increasingly high demands on information security and Cryptography as a core component of modern information security technology, in the field of scientific research has become a hot spot, Digital signature technology in the provision of information confidertiality, integrity, authentication, nonrepudiation, and so on have a wide range of applications, while e-commerce, e-Government has also played an important role.Designed to comply with any cryptosystem Kerckhoff principle, that is, security of cryptosystems depend entirely on the security of the key, once the keys are destroyed will undermine the security of the whole cryptosystem. In order to address key security concerns, has made forward-secure and strong forward security in order to reduce the loss of private key is corrupted.Blind signature technology has important applications in the signature, in order to ensure that the owner of the information being tracked, blind signature technology made a strong and it's very good solution to the issue of information is tracked.Due to the strong forward-secure nature of good and strong blind signature, in e-cash at the same time the introduction of these two properties, you can well solve the security issues of e-cash and electronic cash are tracing. Electronic cash scheme how to design good performance is still important in the future research directions.On the base of previous work, The main work is as follows:1.briefly describes some of the concepts of information security in the important role of information security, cryptography, and this required basic knowledge in mathematics and Cryptography basics model diagram describes related definitions.2.After analyzing,comparing and summarizing the existing signature-scheme with forward-security-character,through introducing the one-way hash chain,the one strong forward-security signature-scheme was obtained.3.recalls that a study and history on blind digital signatures, describing its principles and its properties, a strong blind signatrre scheme was designed and it was based on ELGamal signature system.4. in accordance with requirements of electronic cash, combining strong forward security and strong blind signatures and obtained a signature scheme which had strong forward security character and strong blindness.