| Trojaner-Board | Forum, das sich mit Trojanern, Viren und Spyware und deren Bekämpfung beschäftigt. |
| Sicher im Netz | Beratungsportal für Online-Sicherheit |
| Computer Security Portal | News portal dealing with computer security themes |
| WindowSecurity | Webportal dealing with Windows and Internet Security matters. |
| Heise-Security | Aktuelle Meldungen zum Thema Computersicherheit |
| klicksafe | Auf dieser Seite werden einsteigerfreundlich die Risiken der Computer- und Internetnutzung aufgezeigt. |
| Stunnel | Free program to encrypt arbitrary TCP connections inside SSL (Secure Sockets Layer) available on both Unix and Windows |
| CA Cert | Community driven, Certificate Authority that issues certificates to the public at large for free. |
| Zfone | Free download of the VoIP phone software of Phil Zimmermann which lets you make encrypted phone calls over the Internet |
| Internet Identität | Arbeitsgruppe zum Identitätsschutz im Internet mit Informationen und Reports |
| Network Security Forum | Forum dealing with Security, Linux, Exploits, Wireless and Certifications |
| Spamhaus | Tracks Spammers, provides anti-spam protection for Internet networks and works to identify and pursue spammers worldwide |
| The bunker | Ultra secure computer hosting |
| Trifinite | Website about Bluetooth Security Vulnerabilities and Bluetooth Projects giving download, blog and information |
| Jetico | Securitytools for download: encryption, firewall and diskwiping softwaretools. |
| PhishTank | Collaborative clearing house for data and information about phishing on the Internet. Provides open API for developers. |
| Xatrix | Computer security news and information portal. |
| GNU Privacy Guard | Die freie Software-Implementierung erlaubt die Verschlüsselung und Signierung von Daten und Kommunikation. |
| stobadwar | partnership to protect Internet and computer users from threats to privacy and security caused by bad software. |
| Cexx | Website with tipps and tools against spam and spyware. |
| ENISA | Organization of the European Union, the EU Member States and business community to prevent information security problems |
| Haage & Partner | Hersteller von Software zur Datenrettung, Logfileanalyse sowie Serversoftware und Tools |
| Solved captchas | Overview of widely used captchas and information on their effectivity and weaknesses. |
| Information security | Computer and internet security news portal. |
| eicar | Organization to unite efforts against writing and proliferation of malicious code |
