What is the primary function of a host-based intrusion detection system (HIDS)?

The primary function of a host-based intrusion detection system (HIDS) is to monitor IT systems for suspicious activity. HIDS operates on individual hosts or devices, analyzing the activity occurring on them to detect unauthorized access or anomalies that could indicate an attack. It examines system logs, processes, file integrity, and other metrics to identify potential security breaches or policy violations.

Monitoring for suspicious activity is crucial as it allows for the early detection of threats, enabling organizations to respond quickly and effectively to potential incidents. This proactive approach helps in maintaining the security and integrity of critical systems and data.

Other functions listed, such as preventing attacks on a network or encrypting network traffic, are more aligned with perimeter security or network security solutions rather than the specific role of HIDS. While safeguarding against known vulnerabilities pertains to overall cybersecurity practices, HIDS specifically focuses on detection rather than prevention or encryption.