Multi-factor authentication (MFA) is a method for verifying a user’s identity that requires more than two pieces of verifiable information from different categories. It is therefore an additional layer of security compared to single-factor authentication (SFA), protecting sensitive data more effectively against unauthorized access.
The user enters the first piece of verifiable information, which could be a password, for example (knowledge factor). After the first piece of information has been successfully entered, further verifiable information is requested, such as a one-time password (possession factor) and a fingerprint (inherence factor). All provided information is then compared with the authentication data stored in the system. Access is only granted once all information has been verified and matches; otherwise, access is denied.
Advantages:
Very high security through the combination of several factors.
Significantly reduces the risk of unauthorized access.
Disadvantages:
Increased effort for users, as several verification steps are required.
Higher implementation costs and potentially more complex infrastructure.
If a company plans to introduce a BYOD strategy where employees can use their own devices within the company, multi-factor authentication should be implemented. It is an important means of ensuring that personal devices accessing company resources are securely authenticated. Remote work or mobile working also requires higher security precautions and should be accompanied by an MFA policy.
