Authenticator Apps
Authenticator apps are mobile applications that generate time-based one-time passwords (TOTP) or push notifications for two-factor authentication (2FA) or multi-factor authentication (MFA). They enhance security by requiring a second verification step beyond just a password, typically using a smartphone to generate codes or approve login attempts. These apps are widely used to protect online accounts, such as email, social media, banking, and cloud services.
Developers should learn and use authenticator apps to secure their own accounts and implement 2FA/MFA in applications they build, as they provide a robust defense against phishing, credential theft, and unauthorized access. They are essential for compliance with security standards like GDPR or PCI-DSS, and are commonly integrated into systems requiring high security, such as VPNs, admin panels, or financial platforms. Using authenticator apps over SMS-based 2FA reduces risks like SIM swapping attacks.