This page is about around the theory of authentication, not actual authentication mechanisms as exposed by software systems.

-TimTwelves

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The three authentication factors:

* Something you know, such as a password or PIN.
* Something you have, such as a credit card or hardware token.
* Something you are, such as a fingerprint, a retinal pattern, or other biometrics.

Authentication strength:
* One authentication factor is considered as weak authentication.
* More than one authentication factor is considered strong authentication.

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CategorySecurity