Anirban Das2, Prof. Samir Kumar Bandyopadhyay3, Ratul Chowdhury1, Samir Ghosh1,. 2017. “A Highly Secure Secret Key Encryption Methodology Using Dual Permutation”. International Journal of Contemporary Research and Review 8 (07). https://doi.org/10.15520/ijcrr/2017/8/07/275.