The paper examined the design and implementation of a two-factor authentication login system using OTP with SMS. The quest for the application of tighter security measures to web, desktop and mobile applications developed has been a major concern to a lot of people. Faced with the challenges of poor security and vulnerability of users, resulting to applications being hacked by unauthorized people, the researcher delved into developing a more secured login application that sends a secret passcode to the registered phone number of a user for identification purpose. The aim of the application is basically to ensure that users are safe, and all logins are authorized. The application was developed with PHP, MYSQL, CSS, BOOTSTRAP AND HTML technologies.
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