yksitekijävarmistus
Yksitekijävarmistus, meaning "single-factor authentication" in English, is a security process where only one method of verification is required to grant a user access to a system or account. This contrasts with multi-factor authentication, which requires two or more distinct forms of identification. The most common example of yksitekijävarmistus is a password. When a user enters their username and password, they are relying on a single piece of information, typically something they know, to prove their identity.
Other examples of single-factor authentication include security questions (something you know) or a unique code sent