S. Rahma AM, Ayad Jabbar D. Development cryptography protocol based on Magic Square and Linear Algebra System. JQCM [Internet]. 25Jan.2019 [cited 30Aug.2021];11(1):Comp Page 72 -75. Available from: http://www.qu.edu.iq/journalcm/index.php/journalcm/article/view/470