SMS 2FA
SMS 2FA (Two-Factor Authentication via SMS) 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 identity by combining something the user knows (password) with something the user has (mobile phone). This approach helps prevent unauthorized access even if passwords are compromised.
Developers should implement SMS 2FA for applications handling sensitive data, such as banking, healthcare, or e-commerce platforms, to enhance security and meet compliance requirements like GDPR or PCI-DSS. It's particularly useful for user authentication flows where mobile phone ownership is common, though it's considered less secure than app-based or hardware token methods due to risks like SIM swapping.