International Journal of Electrical Electronics & Computer Science Engineering (IJEECSE)
In this paper the authors aims to enhance authorization and authentication process by using multilevel authentication to protect cloud from malicious user and unauthorized access, implement security measure to protect data of users stored in cloud environment. It will also provide service level security. Also user based access control is applied over user's data so that user can grant, revoke sharing permission at any point according to individual user. The data is removed completely along with access permissions as soon as owner of file request's to remove the file.