Arindom Mondal, Kazi Md. Rokibul Alam, G. G. Md. Nawaz Ali, Peter Han Joo Chong, Yasuhiko Morimoto, Vol. 13, No. 5, May 30, 2019
10.3837/tiis.2019.05.025

• Image secrecy
• Multi-stage encryption
• Visual cryptography
• One time pad
• Steganography
• Least Significant Bit