What is Intruders

Someone who intrudes on the privacy or property of another without permission.

The objective of the intruder is to gain access to a system or to increase the range of privileges accessible on a system.

Intruders can be classified into mainly three types:-

1. Masquerader: An individual who is not authorized to use the computer and who penetrates a system’s access controls to exploit a legitimate user’s account.
2. Misfeasor: A legitimate user who accesses data, programs, or resources for which such access is not authorized, or who is authorized for such access but misuses his or her privileges.
3. Clandestine user: An individual who seizes supervisory control of the system and uses this control to evade auditing and access controls or to suppress audit collection.