Data Storage Security in Cloud Computing: A survey

Cloud computing is the computing technology which provides resources like software, hardware, services over the internet. Cloud computing provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and configuration of the system that delivers the services. Since the data transmission on the internet or over any networks are vulnerable to the hackers attack. Cloud based data storage systems have many complexities regarding critical, confidential, sensitive data of client. The trust required on cloud storage is so far had been limited by users. The data storage in the cloud has been a promising issue in these days. This is due to the fact that the users are storing their valuable data and information in the cloud. The users should trust the cloud service providers to provide security for their data. The cloud service providers also providing the security but not up to a complete level. The attack of malicious insiders into the cloud and to steal the data has been increased. Data store is main future that cloud service provides to the companies to store huge amount of storage capacity. But still many companies are not ready to implement cloud computing technology due to lack of proper security control policy and weakness in protection which lead to many challenge in cloud computing. In this paper we have represented the survey on different issues related to data storage security on single cloud as well as multi cloud and fault tolerance. Keywords— Cloud; cloud computing; multiple cloud; service provider; data storage; data security; audit policy; data correctness; data availability; data integrity.