Cloud computing is one of the latest and an emerging area in the Information and Technology (IT) sector, which has given a different dimension to the organizations. Performance and security aspects of private cloud and widely used public cloud are the major issues which have to be addressed in Cloud Computing. Intrusion is one such critical and important security problem for Cloud Computing. This paper will attempt to give an overall idea about Cloud computing, Intrusion, types of Intrusion Detection Systems and earlier works done on Intrusion Detection System. The key proposal of this paper is to give an overall idea for building a Hybrid Intrusion Detection System that would detect any type of intrusion into the cloud.

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This paper describes cloud computing, its main characteristics and the models that are currently used for both deployment and delivery. It examines the benefits and business issues with using the cloud, and how they can be addressed. It describes some of the early adapters of cloud computing, together with their experiences.