Cloud computing is emerging as a promising IT solution for enabling ubiquitous, advantageous, and on-demand access to a shared collection of customizable processing assets. Nonetheless, the widespread adoption of the cloud is being hampered by a lack of transparency and accountability, which has usually been ensured through security evaluating methods. Cloud computing provides its customers with massive data storage and calculation capabilities. Many people can keep various types of data on the cloud, with or without limitations. To ensure the correctness of re- appropriated information, extra security necessitates a protected dispersed storage framework with an independent effective evaluating administration. As a result, information review, along with security saving, honesty, and dynamic capabilities, performs a capable strategy for avoiding various cloud attacks.

Key Words: access control, block chain, ftp server, cloud computing, data security, data storage