A Decision Tree Based Rule Formation With Combined Pso Algorithm For Intrusion Detection System

2311 WordsMay 20, 201610 Pages
CHAPTER 3 A DECISION TREE BASED RULE FORMATION WITH COMBINED PSO-GA ALGORITHM FOR INTRUSION DETECTION SYSTEM 3.1 INTRODUCTION The increase in the usage of the computer networks leads to the huge rise in the threat and attacks. These attackers change, steal and destroy the valuable information and finally cause complete damage to the computer system of the victim. They affect the performance of the computer system through the misconfiguration activities and generation of software bugs from internal and external networks. Irrespective of the existence of various security mechanism, attackers often attempt to harm the computer system of the intended legitimate users. Hence, security is a main factor for the efficient operation of the network in various applications such as healthcare monitoring, military surveillance, etc. The most common security mechanisms are firewalls, antivirus programs and Intrusion Detection System (IDS). Firewalls (Fehr, 2013) are the commonly used mechanism for securing the corporate network or sub-network. The firewall is operated based on a set of rules that can protect the system from the flooding attacks. The main function is sorting of the packets according to the allow/deny rules, based on the header-filed information. But the firewalls cannot ensure complete protection of an internal network, since they are unable to stop the internal attacks. The computer viruses can cause damage to the computer data that leads to the complete failure of the

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