SMS-Based Two-Factor Authentication
SMS-based two-factor authentication (2FA) is a security method that adds an extra layer of protection to user accounts by requiring a one-time code sent via text message in addition to a password. It verifies user identity by combining something the user knows (password) with something the user has (mobile phone). This approach is widely used for securing online accounts, financial transactions, and sensitive data access.
Developers should implement SMS-based 2FA when building applications that handle sensitive user data, such as banking apps, e-commerce platforms, or enterprise systems, to reduce the risk of unauthorized access from password breaches. It's particularly useful for consumer-facing services where users may not have access to more advanced authentication methods like hardware tokens or biometrics, though it's less secure than app-based 2FA due to vulnerabilities like SIM swapping.