Imam Riadi, Rusydi Umar, and Muhammad Abdul Aziz. “Comparative Security Analysis of Web-Based Instant Messaging Applications”. Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) 4, no. 5 (October 30, 2020): 813-819. Accessed April 19, 2021. http://jurnal.iaii.or.id/index.php/RESTI/article/view/2213.