C.Praveen Kumar, P Suman Prakash, and Dr.S.Prem Kumar. “Cost-Effective Authentic and Anonymous Data Sharing With Forward Security”. International Journal of Computer Engineering in Research Trends, vol. 2, no. 12, Dec. 2015, pp. 1126-31, https://www.ijcert.org/index.php/ijcert/article/view/440.