Single-factor authentication (SFA) is a method of verifying a user’s identity that requires only one piece of verifiable information. This information can be either a knowledge factor (such as a password or PIN) or an inherent factor (such as a fingerprint). However, there are authentication methods that offer more security than SFA.
SFA: How it works
The user enters a verifiable piece of information, such as a password or fingerprint. The system then compares the entered information with the stored authentication data. If the data matches, the user is granted access; otherwise, access is denied.
Advantages and Disadvantages
Advantages:
- Simplicity and user-friendliness.
- Quick implementation.
Disadvantages:
- Lower security compared to multi-factor authentication, as only one piece of information needs to be compromised.
The SFA method is commonly used when shopping in online stores, where the user only logs in with a username and password. Naturally, the more sensitive the data being processed, the higher the protection should be. For online banking, at least two-factor authentication is therefore required.
