Design of Secure E-mail System for PDF Document
面向PDF文档的安全电子邮件系统

A secure E-mail system for PDF document which use modern information security technology,data encryption and network security is proposed.The main idea is to use request-response mechanism between client and server to provide information security service for terminal users,the application technology of secure E-mail include releasing,exploring and sear-ching encrypted data etc.The system has already been implemented in a Windows platform which is established for enterprise application and take a good effect in practice.