多用户电子签章系统设计与实现

摘要

To solve the problem of multiple users sealing the electronic document, a multi-user digital seal system with digital multi-signature based on RSA is designed. After the idea of digital multi-signature is introduced, the system framework and the system architecture are presented. Digital watermarking is used to protect cachet image from being copied and forged, at the same time to keep the uniqueness. An eKey is used to store the cachet image and some key for improving the system safety. An ActiveX control is used as carrier to store digital cachet and signature information for keeping the structure of document. Result of experiment indicates that the system has stronger safety and practical.%为了解决电子文档中多用户签章问题,设计出一种基于RSA有序多重签名方案的多用户签幸系统.在阐述多重电子签幸方案的基础上,给出系统组成框架,并从实现角度给出系统体系结构.系统采用数字水印技术保证印章图像的唯一性并实现防拷贝、防伪造；采用eKey技术存储印章图像和相关密钥,提高系统安全性；采用ActiveX控件作为载体保存电子印章图像及签名信息,保证Word文档结构的完整性.相关实验结果表明,该系统安全可靠并具有很强的实用性.