Secure Scalable Private Cloud: A Survey

The Cloud computing scenario is the reason why we are widely speaking about Security, Privacy and Trust issues even though it exists since the evaluation of the Internet. Any client/small organization/enterprise that processes data in the cloud is subjected to an inherent level of risk because outsourced services bypass the "physical, logical and personnel controls" of the user. When storing data on the cloud, one might want to make sure if the data is correctly stored and can be retrieved later. As the amount of data stored by the cloud for a client can be enormous, it is impractical and very costly to retrieve all the data, if one's purpose is just to make sure that it is stored correctly. Hence there is a need to provide such guarantees to a client. Hence, it is very important for both the cloud provider and the user to have mutual trust such that the cloud provider can be assured that the user is not some malicious hacker and the user can be assured of data consistency, data storage and the instance he/she is running is not malicious. Hence the necessity for developing trust models/protocols is demanding. Here we give a brief survey of the different techniques used for securely stored data on the cloud by keeping in mind all the necessary parameter.