Study On Digital Signature Technique And Its Application To The Social Insurance Network Information System

In the present day which information security becomes more and more important, digital signature with authentication, integrity, unforgeability and nonrepudiation is being more concerned about, and it has been widely used in various fields, such as e-business, e-government.This paper introduces cryptography and digital signature technologies in detail. The paper also discusses threshold multisignature scheme and proxy signature scheme which are two special classes of digital signature schemes. The forgery attack and time-stamped are the key issues in LHL threshold multisignature scheme and MUO96 proxy signature scheme, respectively.By applying the concept of decentralized power in real life, an inproved time-stamped proxy signature scheme without a trusted party is presented in this paper. The main idea of this scheme is that the time-stamped is signed by the improved LHL threshold multisignature scheme, and then the messages with time-stamped are signed by proxy. To deal with the forgery attack in LHL threshold multisignature scheme, the members need to verify their public keys each other. Finally, this paper studies digital signature and its correlative technologies' application to social insurance network information system.Based on PKI, it employs certificate and SSL to design the main arithmetic of digital signature and achieve digital signature's correlative function module. These arithmetic and module are the foundation of user authentication and data transaction safety in social insurance network information system.