Cloud computing is an internet supported plan that empowers suitable, on request and payment per use access to a pool of shared resources. It is a novel technology that convinces a user’s condition for computing resources similar networks, storage, servers, services and applications, Data protection is one of the leading interest and fundamental challenges of cloud computing. This issue is getting more genuine with the development of cloud computing. From the consumers’ view, cloud computing protection interest, especially data protection and privacy shield conclusion, abide the fundamental inhibitor for the adoption of cloud computing services. This paper retrospect and analyses the fundamental problem of cloud computing and explain the data security and privacy protection conclusion in the cloud.