This chapter presents an authentication system that requires users to register and provide basic details before accessing the login module. Upon successful registration, users can proceed to authenticate their accounts by entering the email ID and password used during registration. Once the email ID and password are verified, users can proceed to the next authentication step, which involves selecting a QR (Quick Response) Code as the authentication method. The system generates a QR code and displays it on the user’s phone or device. It is important to note that the QR code remains valid for only 30 s, after which a new and refreshed QR code is generated to enhance security. The effectiveness and security of this authentication system were achieved through the use of registration, email ID and password authentication, and time-limited QR code generation.