Xayxanadasy, K., B. Khaminsou, P. Thanavanh, and P. Phosipong. “Cryptography for Information”. Souphanouvong University Journal Multidisciplinary Research and Development, vol. 7, no. 1, June 2021, pp. 19-28, http://www.su-journal.com/index.php/su/article/view/100.