Zahra Ghanbari - Department of Electrical Engineering and Information Technology Azad University of Tehran-Electronic Branch Tehran, Iran

Today, Cloud computing technology provides reliability and accessibility for users and a good business for providers but the most important part is security of the Cloud .By increasing amount of network and security threat, detecting attacks on cloud is really necessary. Intrusion Detection System (IDS) is the most common mechanism for detecting attacks on cloud. This paper provides a study on different intrusion detection system (IDS) with respect their type, location, detection techniques and attacks they can detect. In addition we provide the difference between IDS techniques. For having a secure cloud, it needs to be introduced into many existing IDS implementation and using multiple detection methods to cope with security challenges in cloud.

Cloud computing; intrusion; intrusion detection system; IDS; NIDS; HIDS; DDIS;