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In today's world, overall global mostly depend on technologies for their information storage and transactions. But this frequent use of online technologies make the data stored exposed to the risk of attacks towards the data in the form of intrusion. In order to save our data from these attacks, the researchers had implemented a concept called intrusion detection system, with the help of detection technology the users can prevent their critical data from different kind of attacks. As we know that there are lots of intrusion detection system in market which are either open source and some of them are commercial. Although the number is very high but there is no such classification available in research literature which will help user or security professionals. In this paper we will present a good and elaborated classification based on various parameters which will help the researchers and security professional to understand the category. The paper will also provide a brief detail of those categories which will give idea of representing the intrusion detection techniques.

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This paper reiterates the fact that computer ethics is a job of computer scientist and not philosophers. This paper is divided into three sections. First section provides with a brief explanation and discussion on the weaknesses and shortcomings of classical ethical theories like Divine command theories, Ethical Egoism, Kantianism, Utilitarianism, Social Contract Theory and Virtue Ethics, which makes them unfit for the application of computer ethics. Second section discusses the ambiguity in theories proposed for foundation of computer ethics. Third section deals with professional ethics and discusses that Computer ethics is a domain of computer scientist. This article gives a clear picture of shortcoming of traditional ethical theories and need of new theory to deal with computer ethics. This article points out flaws in theories trying to give foundation for computer ethics. We suggest professional ethics as practical and preventive measure for computer ethics that caters to its requirements. We also explores the role of computer scientist for the application of computer ethics as a profession.

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