Ms.R.Meena, Ms.K.Thalima Nasreen , Ms.K.Nathiya. Secure Pin Authentication Qr Code For Cloud Based Arbitrary Question Generation. IJAST [Internet]. 2020May20 [cited 2024May4];29(7):2902-8. Available from: http://sersc.org/journals/index.php/IJAST/article/view/18192