用c#开发的B/S模式的图书在线出版系统DB事sql server,为三层模式,用户层,业务逻辑层,DB层,详细说明见附录-with the development of B / S mode of books online publishing system DB things sql server, for the three-tier model, the user layer, business logic tier, DB layer details, see appendix

模仿CA颁发证书模式，模拟证书颁发与认证。并假设Alice给Bob发送加密后的文档及文档的签名，Bob验证Alice证书的正确性和加密文档的正确性并最终解密文档。执行顺序为CA_Key-->CA-->Alice-->拷贝Alice的证书和加密文档给Bob-->Bob-Imitation of the CA that issued the certificate mode, analog certification and certification. And assume