P.Chinnasamy, A.Ganesan, V.Prasathkumar, V.Praveena. “A Trusted-Role Based Access Control Model for Secure Cloud Storage”. International Journal of Advanced Science and Technology, Vol. 29, no. 9s, May 2020, pp. 3253 -59, http://sersc.org/journals/index.php/IJAST/article/view/15884.