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Authentication
The process of verifying the identity of a user, device, or system before granting access.
Also known as:
Auth, Identity Verification, Login
Security
Authentication is the process of verifying the identity of a user, device, or system. It ensures that the entity requesting access is who or what it claims to be.
Common Authentication Methods
- Password-based – Username and password combination
- Multi-Factor Authentication (MFA) – Combines two or more verification methods
- Biometric – Fingerprint, face recognition, or iris scan
- Token-based – JWT, OAuth tokens
- Single Sign-On (SSO) – One login for multiple applications