CA-1999-02: Trojan Horses
   http://www.cert.org/advisories/CA-1999-02.html
CA-1999-04: Melissa Macro Virus
   http://www.cert.org/advisories/CA-1999-04.html
CA-2000-01: Denial-of-Service Developments
   http://www.cert.org/advisories/CA-2000-01.html
CA-2000-02: Malicious HTML Tags Embedded in Client Web Requests
   http://www.cert.org/advisories/CA-2000-02.html
CA-2001-22: W32/Sircam Malicious Code
   http://www.cert.org/advisories/CA-2001-22.html