> For the complete documentation index, see [llms.txt](https://docs.arkannis.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.arkannis.net/cloud/azure/courses/az900-course/azure-identity-services/multi-factor-authentication-mfa.md).

# Multi-Factor Authentication (MFA)

## Multi-Factor Authentication (MFA)

* Requires 2 or more pieces of evidence (factors) in order to prove who you are
* Three Factors:
  * **Something you know** - i.e Password
  * **Something you have** - i.e mobile phone, access to email account
  * **Something you are** - i.e fingerprint

{% hint style="info" %}
Your unique password could be 1 piece of evidence
{% endhint %}

But a second piece of evidence is required - a unique, time-limited code sent to you:

* SMS
* Authentificator app
* Phone call
* Email


---

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