  Role-based access control (RBAC) models have generated a great interest in
the security community as a powerful and generalized approach to security
management and ability to model organizational structure and their capability
to reduce administrative expenses. In this paper, we highlight the drawbacks of
latest developed RBAC models in terms of access control and authorization and
later provide a more viable extended-RBAC model, which enhances and extends its
powers to make any system more secure by adding valuable constraints. Later the
Blobs are stored on cloud server which is then accessed by the end users via
this Extended RBAC model.
