Two-Factor Authentication

Sites with Two-Factor Authentication

Looking for a way to keep your online accounts (cloud storage, banking, social media, email, etc.) as secure as possible?

Two-factor verification (also known as two-step authentication, abbreviated to TFA) is a process involving two stages to verify the identity of a user trying to access services in a computer or in a network. This is a special case of a multi-factor authentication which might involve only one of the three authentication factors (a knowledge factor, a possession factor, and an inherence factor) for both steps. If each step involves a different authentication factor then the two-step authentication is additionally two-factor authentication. (Wikipedia) Read more