Abhishek Arvind, Pradyumna Mahajan, Rishikesh Chalke. TOTP Based Authentication Using QR Code For Gateway Entry System. int. jour. eng. com. sci [Internet]. 2020 May 11 [cited 2024 Jul. 3];9(05):25023-8. Available from: https://ijecs.in/index.php/ijecs/article/view/4481