In recent years, cloud computing has become popular in almost all the computerized industries. Machinery which is involved in cloud computing are able to deliver the services in a scalable manner. It provides various benefits for better computing, via storage in one huge machine only, memory process and high bandwidth. If we use cloud computing it gives both positive and negative effects on data security. This paper has mainly put the light on, about the risk involved in cloud computing. It includes different types of risks involved in cloud computing and how their presence can affect the users of cloud. It also discusses the different situations in which the risks occur and what should be the measures to be taken to prevent them. The paper also tried to lay out measures to be taken while using cloud computing to reduce negative effects on the outputs and maintain data integrity.