Poornima Badgi, Kavya Ravishankar, Neha K S, and Nandini. “Multilevel Image Encryption and Decryption Based On Biometric Approach”. International Journal of Progressive Research in Science and Engineering, vol. 1, no. 5, Aug. 2020, pp. 79-84, https://journal.ijprse.com/index.php/ijprse/article/view/156.