Malicious Insider Threats
The insider attack has traditionally been a primary threat to computer systems. ( http://csrc.nist.gov ).
The explosion of the Internet made things worse: Insiders commit about 80% of all computer and Internet related crime (www.intergov.org) and CSI/FBI 2003 Computer Crime and Security Survey.
- Insiders: participants with legitimate access or those that bypassed the protection mechanisms and exhibit arbitrary (malicious) behavior.