International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Cloud storage provides a convenient means of storing and retrieval of hug amount of data. With this facility, organizations and individuals can outsource their data to cloud. Though cloud storage gives significant benefits to users, there are security concerns as well. Since the cloud users store their valuable business data in cloud, the security is an utmost concern. Moreover the cloud server has to be untrusted since it is accessed through a public network such as Internet. Many techniques came into existence to address the storage security problem in cloud.