关键词: 公钥基础设施, 云端数字签名, 信息安全, 签名协议, 签名流程

Abstract: Transmission signed file transfer of digital signature technology based on Public Key Infrastructure(PKI) is usually subject to factors such as the environment,the terminal,and the file format between the users,and the signatures between different signature systems are not compatible either.In order to solve these problems,this paper analyzes and studies the cloud digital signature technology,including its advantages,specific protocol and signature procedure,and designs the cloud signature system.The system applications are put on the cloud server,and users only need a simple text interaction with the cloud server to achieve cross-platform operation of signature files.The application results show that the signature operation of the cloud digital signature system possesses the features of unity,convenience and universality.The system can ensure that the signed files are compatible with each other and have the characteristics of high security and low cost of equipment maintenance.

Key words: Public Key Infrastructure(PKI), cloud digital signature, information security, signature protocol, signature process