Two-Factor Authentication
Two-Factor Authentication (2FA) is a security method that requires two different ways to confirm your identity when logging in. It adds an extra layer of protection on top of a password.
How it works
After entering your password, the system asks for a second confirmation. This second step proves that it is really you trying to access the account.
Even if someone steals your password, they cannot log in without the second factor.
Common types of second factors
The second factor is usually:
- a code sent to your phone
- an app-generated code
- a fingerprint or face scan
- a physical security key
Each option increases account security.
Why 2FA is important
Two-Factor Authentication helps protect against:
stolen passwords
phishing attacks
- unauthorized access
- account takeovers
It significantly reduces the risk of hacking.
Where 2FA is used
2FA is commonly used for:
- email accounts
- social networks
- online banking
- work and cloud services
Many platforms strongly recommend enabling it.
Simple example
Two-Factor Authentication is like needing both a key and an ID card to enter a secure building.
Related terms
- What is Password?
- What is VPN?
- What is Phishing?
Source
Information simplified from the Wikipedia article “Multi-factor authentication”.