Carol J. Fung and Quanyan Zhu
Computer systems evolve to be more complex and vulnerable. Cyber attacks have also grown to be more sophisticated and harder to detect. Intrusion detection is the process of monitoring and identifying unauthorized system access or manipulation. It becomes increasingly difficult for a single intrusion detection system (IDS) to detect all attacks due to limited knowledge about attacks. Collaboration among intrusion detection devices can be used to gain higher detection accuracy and cost efficiency as compared to its traditional single host-based counterpart.