Security.

Email encryption.

Digital document signing.

Security alerts.

http://www.us-cert.gov/cas/techalerts/index.html

Technical Cyber Security Alerts provide timely information about current security issues, vulnerabilities, and exploits.

http://www.cert.org/advisories/

CERT/CC Advisories (1988 - 2004)

http://cve.mitre.org/cve/index.html

CVE® is a publicly available and free to use list or dictionary of standardized identifiers for common computer vulnerabilities and exposures.

Check broswer privacy leaks.

• http://browserspy.dk/
• https://whoer.net/
• http://ip-check.info/