What is Biometric Authentication?
Turkish: Biyometrik Kimlik Doğrulama
Biometric authentication uses device biometrics such as face or fingerprint checks for login and sensitive approvals.
What is Biometric Authentication?
Biometric authentication lets a user log in or approve a sensitive action with face, fingerprint, or another biometric method supported by the device. The app usually does not see the biometric data itself; verification is handled by the operating system and secure hardware layer.
How It Works
The mobile app calls the native biometric API on iOS or Android. The system asks the user for Face ID, Touch ID, fingerprint, or device PIN verification. The app receives only a success or failure result. Sensitive keys can be stored in secure storage such as Keychain or Keystore.
Where It Is Used
Common examples include money transfer approval in banking and wallet apps, fast login in enterprise apps, sensitive health data access, and high-risk checkout steps in commerce apps. Biometrics can reduce friction, but they should not be the only account access path without recovery, device-change, and accessibility options.
Passkey and WebAuthn combine biometrics with cryptographic keys for passwordless sign-in. From a mobile app security perspective, biometrics should be treated as one part of the session and risk model, not as a complete server-side authorization strategy by itself.
Related Terms
Mobile app security protects application code, API traffic, sessions, and on-device data from abuse and compromise.
PasskeyA passkey is a phishing-resistant sign-in method that uses a device-held private key plus biometric or PIN approval instead of passwords.
WebAuthnWebAuthn is a web standard that lets browsers use security keys and passkeys for strong, passwordless authentication.