Two-factor authentication

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Additional security with two-factor authentication

Two-factor authentication

The easiest, and most common method of proving to a computer service that you are who you say you are is having a password. A password is a knowledge factor.

Two-factor authentication requires two different types of authentication to be used in parallel, i.e. a knowledge factor and a possession factor.

The possession involves using a secondary device, such as a phone or bank password generator, to receive a temporary (or soft) code. You then share the code back to the computer so it can verify that not only do you know the password, but you also have access to the associated device.

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