Intrusion Detection System in Cloud Computing: Challenges and opportunities

Today, Cloud Computing is the preferred choice of every IT organization since it provides flexible and pay-per-use based services to its users. However, the security and privacy is a major hurdle in its success because of its open and distributed architecture that is vulnerable to intruders. Intrusion Detection System (IDS) is the most commonly used mechanism to detect attacks on cloud. This paper provides an overview of different intrusions in cloud. Then, we analyze some existing cloud based intrusion detection systems (IDS) with respect to their type, positioning, detection time, detection technique, data source and attacks they can detect. The analysis also provides limitations of each technique to evaluate whether they fulfill the security requirements of cloud computing environment or not. We emphasize the deployment of IDS that uses multiple detection methods to cope with security challenges in cloud.