ABSTRACT
Intrusion detection is the process of detecting an unauthorized use of, or attack upon, a computer or a telecommunication network. Intrusion detection systems (IDSs) are designed and installed to aid in deterring or mitigating the damage that can be caused by hacking, or breaking into sensitive IT systems. IDSs are software or hardware mechanisms that detect such misuse. IDSs can detect attempts to compromise the confidentiality, integrity, and availability of a computer or network. The attacks can come from outsider attackers on the Internet, authorized insiders who misuse the privileges that have been given them, and unauthorized insiders who attempt to gain unauthorized privileges. IDSs cannot be used in isolation, but must be part of a larger framework of IT security measures.
