Vignesh M, R. Naresh. “Hierarchical Cipher-Text Policy Attribute Based Encryption Scheme for File Collection in Cloud Computing Environment”. International Journal of Advanced Science and Technology 29, no. 05 (May 28, 2020): 9107-9118. Accessed April 27, 2024. http://sersc.org/journals/index.php/IJAST/article/view/18981.