Now a day’s information system security is a major concern as information is equally valuable as money, other physical assets and ultimately as human life. Now a day, records of bank, insurance, airlines, universities, policies, armies, government, private offices and research are kept on computer based system. These records may comprise of many confidential and important data. Every stakeholders of these data wants to preserve and wants to maintain the severity of leakage.
Moreover any unethical job of doctor may destroy the life a single people but any unethical and malicious job of information system may destroy uncountable life. Thus it is essential to secure the information system.