Sudiarto Raharjo W, E.K. Ratri ID, Susilo H. IMPLEMENTASI TWO FACTOR AUTHENTICATION DAN PROTOKOL ZERO KNOWLEDGE PROOF PADA SISTEM LOGIN. JuTISI [Internet]. 2017Apr.8 [cited 2024Dec.27];3(1). Available from: http://114.7.153.31/index.php/jutisi/article/view/659