Abstract

System protection mechanisms such as access controls can be fooled by authorized but malicious users, masqueraders, and misfeasors. Intrusion detection techniques are therefore used to supplement them. However, damage could have occurred before an intrusion is detected. In many computing systems the requirement for a high degree of soundness of intrusion reporting can yield poor performance in detecting intrusions and cause long detection latency. As a result, serious damage can be caused either because many intrusions are never detected or the average detection latency is too long. The process of bounding the damage caused by intrusions during intrusion detection is referred to as intrusion connement. We justify the necessity for intrusion connement during detection by using a probabilistic analysis model, and propose a general solution to achieve intrusion connement. The key idea of the solution is to isolate likely suspicious actions before a denite determination of in...

Citations