MD5在线查询破解，MD5解密加密。

Beyond Security will help you expose your security holes and will show you what the bad guys already know about your hosts and network.

The Metasploit Framework is the open source penetration testing framework with the world's largest database of public, tested exploits.

Computer security training, certification and free resources. We specialize in computer/network security, digital forensics, application security and IT audit.

SecurityFocus is the most comprehensive and trusted source of security information on the Internet.

岁月联盟：一个专业的网络信息安全门户网站，也是一个专业的交流平台，整合有效的海量的相关资源，建立一个庞大的在线资源库，提供一个高效的资料库供广大网友学习查询！

Black Hat Conventions put you face to face with people on the cutting edge of network security, and with no vendor pitches!

Computer security and information security: advisories, exploits and vulnerabilities database, articles and security news.

Computer security and networking portal.

milw0rm exploits and 0day exploits database.