![]() Furthermore, they are gradually connected with the Internet. They are also at the heart of safety critical systems and carry out key information that require strong need in terms of availability and integrity. Industrial control systems (ICS) are no longer restricted to industrial production. BACKGROUND Any action that is not legally allowed for a user to take towards an information system is called intrusion and intrusion detection is a process of detecting and tracing The results show that these methods can be generally used to detect a variety of common attacks. The method uses an autoassociative kernel regression (AAKR) model coupled with the statistical probability ratio test (SPRT) and applied to a simulated SCADA system. Finally, it presents the application of techniques developed for monitoring critical process systems, such as nuclear power plants, to anomaly intrusion detection. This paper will briefly discuss the history of research in intrusion detection techniques and introduce the two basic detection approaches: signature detection and anomaly detection. One of the interesting countermeasures for enhancing information system security is called intrusion detection. Researchers estimate that malicious online actions may cause $75 billion at 2007. ![]() ![]() With the constantly growing number of internet related computer attacks, there is evidence that our critical infrastructure may also be vulnerable. These systems have been the focus of increased security and there are concerns that they could be the target of international terrorists. ![]() – Most critical infrastructure such as chemical processing plants, electrical generation and distribution networks, and gas distribution is monitored and controlled by Supervisory Control and Data Acquisition Systems (SCADA). ![]()
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