> For the complete documentation index, see [llms.txt](https://docs.1kosmos.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.1kosmos.com/authentication/passwordless-for-web-apps/multi-factor-authentication.md).

# Multi-Factor Authentication

Multi-factor Authentication (MFA) requires users to verify their identity using two or more factors before gaining access.

***

### Overview

1Kosmos supports a range of second-factor methods, giving administrators the flexibility to enforce the right level of security for their users and applications.

### Available Authentication Methods

| Method                 | How it works                                                       |
| ---------------------- | ------------------------------------------------------------------ |
| **OTP via Email**      | A one-time passcode is sent to the user registered email address   |
| **OTP via SMS**        | A one-time passcode is sent to the user registered mobile number   |
| **OTP via Voice Call** | A one-time passcode is delivered via a voice call                  |
| **Hardware Token OTP** | User generates a passcode from a linked hardware token             |
| **Push Notification**  | A push notification is sent to the 1Kosmos mobile app for approval |
| **QR Code**            | User scans a QR code using the 1Kosmos mobile app                  |

All methods can be used standalone or in combination with a password as a second factor.

How to setup on AdminX, visit [setup multi factor authentication](/authentication/admin-portal/authentication/setup-multi-factor-authentication.md)


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