openssl生成pem数字证书: http://hi.baidu.com/chi99/blog/item/e2a769df338ce61a63279892.html
OpenSSL体系下使用密钥数字证书等: http://zhoulifa.bokee.com/6079257.html
SSL-用Keytool和OpenSSL生成和签发数字证书: http://zhouzhk.iteye.com/blog/136943
加密技术、密钥和证书 http://www.microsoft.com/china/technet/security/guidance/secmod39.mspx
关于私钥加密、公钥加密、签名在生活中的场景 http://www.cnblogs.com/chenxizhang/archive/2010/03/24/1693396.html
详解公钥、私钥、数字证书的概念:http://pepa.iteye.com/blog/250991 、http://conkeyn.iteye.com/blog/323467
Code Examples – Signing a message:http://www.flexiprovider.de/examples/ExampleSMIMEsign.html
数字证书知识: http://www.ipees.cn/user/intro/digitalcert.jsp
密码学基础:http://blog.youkuaiyun.com/zhulinfeiba/archive/2009/11/19/4833696.aspx
数字证书:http://baike.baidu.com/view/16501.htm