| Heise-Security | Aktuelle Meldungen zum Thema Computersicherheit |
| SecurityFocus.com | Lists concrete security problems of programs. Not only securityexperts but all end user should take a look here. |
| Jetico | Securitytools for download: encryption, firewall and diskwiping softwaretools. |
| Sicher im Netz | Beratungsportal für Online-Sicherheit |
| TrueCrypt | Free open-source disk encryption software for Windows XP/2000/2003 and Linux |
| Cexx | Website with tipps and tools against spam and spyware. |
| Trifinite | Website about Bluetooth Security Vulnerabilities and Bluetooth Projects giving download, blog and information |
| The bunker | Ultra secure computer hosting |
| Internet Identität | Arbeitsgruppe zum Identitätsschutz im Internet mit Informationen und Reports |
| CA Cert | Community driven, Certificate Authority that issues certificates to the public at large for free. |
| GNU Privacy Guard | Die freie Software-Implementierung erlaubt die Verschlüsselung und Signierung von Daten und Kommunikation. |
| IT-Observer | Information technology portal with news and downloads focussed on network technology and security topics |
| Spamhaus | Tracks Spammers, provides anti-spam protection for Internet networks and works to identify and pursue spammers worldwide |
| Computer Security Portal | News portal dealing with computer security themes |
| eicar | Organization to unite efforts against writing and proliferation of malicious code |
| Hack FAQ | Basic information about the underlying mechanics which are used to attack computers. |
| WindowSecurity | Webportal dealing with Windows and Internet Security matters. |
| Xatrix | Computer security news and information portal. |
| Trojaner-Board | Forum, das sich mit Trojanern, Viren und Spyware und deren Bekämpfung beschäftigt. |
| Firewall.cx | Networking and security news and forums |
| Network Security Forum | Forum dealing with Security, Linux, Exploits, Wireless and Certifications |
| cgi security | Portal about web application security |
| Stunnel | Free program to encrypt arbitrary TCP connections inside SSL (Secure Sockets Layer) available on both Unix and Windows |
| PhishTank | Collaborative clearing house for data and information about phishing on the Internet. Provides open API for developers. |
| Haage & Partner | Hersteller von Software zur Datenrettung, Logfileanalyse sowie Serversoftware und Tools |
