Shaaban, H., A. Alramahi, and F. Sari. “H.A.F Technique for Documents and Archaeologist Images Encryption”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 25, no. 3, Mar. 2016, pp. 142-53, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/5334.