monitekijätodennus

Monitekijätodennus, often abbreviated as MFA, is a security process that requires users to provide two or more verification factors to gain access to a resource, such as an online account or a virtual private network. This method is designed to add an extra layer of security beyond just a password. The verification factors are typically categorized into three types: something the user knows (e.g., a password or PIN), something the user has (e.g., a smartphone, a security token, or a smart card), and something the user is (e.g., a fingerprint or facial recognition).

When a user attempts to log in, they are first prompted for their primary authentication factor, usually their password. After successfully entering this, they are then asked for a second factor. For instance, they might need to enter a code sent to their registered mobile device, use a fingerprint scanner on their device, or insert a physical security key. If both factors are validated, access is granted. This multi-layered approach significantly reduces the risk of unauthorized access, even if one of the factors, such as a password, is compromised.

MFA is widely implemented by organizations and online services to protect sensitive data and user accounts from cyber threats like phishing attacks, credential stuffing, and brute-force attacks. Its adoption is a crucial step in strengthening digital security for individuals and businesses alike. The effectiveness of MFA lies in the difficulty it presents for attackers to bypass multiple security measures simultaneously.