Lisävarmennusta

Lisävarmennusta, also known as supplementary authentication or two-factor authentication (2FA), is a security process used to verify the identity of a user attempting to access a system or service. It is an additional layer of security beyond the standard username and password combination. The primary goal of lisävarmennusta is to enhance the security of online accounts and protect them from unauthorized access.

The process typically involves two or more factors to authenticate a user's identity. These factors can include something the user knows (such as a password), something the user has (such as a mobile device or a hardware token), or something the user is (such as biometric data like a fingerprint or facial recognition). Common methods of lisävarmennusta include:

1. SMS-based authentication, where a one-time password (OTP) is sent to the user's mobile phone.

2. Authenticator apps, which generate OTPs based on a shared secret between the app and the service.

3. Hardware tokens, such as USB keys or smart cards, that generate OTPs.

4. Biometric authentication, using fingerprint scanners, facial recognition, or other biometric methods.

Lisävarmennusta is widely used by financial institutions, government agencies, and other organizations that handle sensitive information. It helps to mitigate the risks associated with password-based authentication, such as phishing attacks and password theft. By requiring an additional factor, lisävarmennusta significantly reduces the likelihood of unauthorized access to accounts and sensitive data.