An intruder is an individual or program that gains unauthorized access to computer systems or networks with malicious intent.
- It can be external attackers (outsiders) or malicious insiders. Their actions may include stealing data, launching attacks, installing malware, or disrupting services.
Types:
- Masquerader: External person using false identity.
- Misfeasor: Legitimate user misusing access.
- Clandestine User: Gains control and hides their presence.
