Many different demands can be made of intrusion detection systems. An important requirement is that it be effective. i.e. that it should detect a substantial percentage of intrusions into the supervised system, while still keeping the false alarm rate at an acceptable level.
This paper aims to demonstrate that, for a reasonable set of assumptions, the false alarm rate is the limiting factor for the performance of an intrusion detection system. This is due to the base-rate fallacy phenomenon, that in order to achieve substantial values of the Bayesian detection rate, P(Intrusion/Alarm), we have to achieve - a perhaps unattainably low - false alarm rate.
Click Here to download this article
Receive all the latest articles by email!
Get all articles delivered directly to your mailbox as and when they are released on WindowSecurity.com! Choose between receiving instant updates with the Real-Time Article Update, or a monthly summary with the Monthly Article Update. Sign up to the WindowSecurity.com Monthly Newsletter, written by George Chetcuti, BSc in Computing & IS (Honors), containing news, the hottest tips, security links of the month and much more. Subscribe today and don't miss a thing!
