Two-Factor Authentication
Simple Explanation
Two-factor authentication adds a second check when you sign in, such as a code or security key.
Technical Explanation
Two-factor authentication combines two different types of proof, typically a password and a possession-based or biometric factor.
Business Use Case
A business requires a second factor for staff accessing company email.
Real-Life Example
After entering your password, you approve a sign-in request on your phone.
Diagram showing a password followed by a second verification step before access is granted.