Reports the results of a workshop on ensuring the security of information against malevolent actions by insiders in the intelligence community with access to sensitive information and information systems. Reports the results of a workshop on the problems of ensuring the security of information against malevolent actions by insiders in the intelligence community (IC) with access to sensitive information and information systems. Attendees discussed community system models, vulnerabilities and exploits, attacker models, and event characterization, and discussed databases that would aid them in their work.