Abstract
Traffic anomalies and attacks are commonplace in today's networks, and identifying them rapidly and accurately is critical for large network operators. Intrusion detection systems are an important component of defensive measures protecting computer systems and networks from abuse.
For an intrusion detection system, it is important to detect previously known attacks with high accuracy. However, detecting previously unseen attacks is equally important in order to minimize the losses as a result of a successful intrusion. It is also equally important to detect attacks at an early stage in order to minimize their impact. To address these challenges, this paper proposes to improve the efficiency of the network intrusion detection process by including an Event Calculus based specification to detect the registered and expected behaviour of the whole network. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of [name organizer]