> ## Documentation Index
> Fetch the complete documentation index at: https://docs.superoffice.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Multi-factor authentication

> Multi-factor authentication

**Multi-factor authentication (MFA) means that a user must prove their identity in 2 or more ways (factors) before they are successfully signed in.** This adds an extra layer of security.

## What is the difference between MFA and 2FA?

Two-factor authentication (2FA) is simply a subset of MFA. You combine exactly 2 factors to authenticate the user.

For example, when you enter a PIN to pay with your credit card at the store, you are using 2FA!

## Can I use MFA with SuperOffice CRM Online?

Multi-factor authentication is a feature offered by some [identity providers][1] (IDP).

<Tip>
  If your 3rd-party provider supports it - you get it.
</Tip>

In the SuperOffice sphere, this means that yes - you can use MFA **if you register your IDP and your registered IDP supports MFA.**

[Guide to federated identity management][3]

[1]: ./federated-id-and-identity-providers

[3]: ./superid/howto/federated-sign-in-guide


## Related topics

- [Federated ID and identity providers](/en/online/identity/federated-id-and-identity-providers.md)
- [Security requirements](/en/developer-portal/standard-app/requirements/security.md)
- [Introduction](/en/api/overview/quickstart.md)
- [Security and best practices](/en/online/mail-services/mailgun/security.md)
- [Mobile CRM security in SuperOffice CRM Online](/en/mobile/security.md)
- [Getting started with SuperOfficeDocs](/contribute/getting-started.md)