Study On Hybrid Signcryption Scheme Based On PKI

Information security is the premise and foundation of all communications based on computer network.Public Key Infrastructure(PKI),a set of security services,such as authentication,authorization,encryption,decryption,digital signature,etc,provides a platform for information security.PKI,based on public key cryptosystem,is a new information security technology and criterion.Up to now,the best way in solving all problems of network information system and communication security is consummating and executing PKI system.Moreover,cryptographic technique is the kernel technology of information security.In the face of pressing situation,enhancing study and innovation of cryptographic technique is important on theory and application value.The main studying content including:Firstly,using RSA algorithm and Hash function,combing some existing threshold group signature,proposed a new safe signature.Secondly,with the research on security and efficiency of existing cipher algorithm, and study on PKI,designed a hybrid signcryption scheme based on PKI.Thirdly,by analysing the security demand of digital compus,proposed a security frame of network information system based on PKI,and applied the designed hybrid signcryption scheme into the construction of safe digital compus.