Abstract-Cloud computing is a kind of computing, which is highly scalable and use virtualized resources that can be shared by the users. Cloud computing provides scalable services to end users with greater flexibility and less infrastructure. Cloud services include software as a service, platform as a service, and infrastructure as a service. These services are provided by using different protocols and standards. Economic benefits are the main driver for the cloud, since it promises the reduction of capital expenditure and operational expenditure. One of the most significant search done on cloud computing is to provide security to the cloud environment. Cloud computing can be threatened by various cyber attacks, because most of the cloud computing systems provide services to many people who are not proven as trustworthy. In this paper, we are going to compare the techniques to detect the intrusion in cloud computing. The techniques used are Signature Based detection (SD), Anomaly-based Detection (AD) and Stateful Protocol Analysis.