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intrusion detection

/ɪnˈtruːʒən dɪˈtɛkʃən/ · in·troo·zhun det·ehk·shun
noun
  1. The process or system that identifies unauthorized or malicious activity on a computer network or system. The company's intrusion detection system flagged a suspicious login attempt.
  2. The act of detecting intrusion. Effective intrusion detection can prevent data breaches.
Did you know? The first commercial intrusion detection system was introduced in 1994 by McAfee, marking a major milestone in network security.
Written by Lexi Wordsworth, Dictionary Editor 2 lookups Added Aug 10, 2026