2020-02-29 00:43:59 +00:00
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---
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layout: default
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2021-02-12 05:59:42 +00:00
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title: Time-based One-Time Password
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2020-02-29 00:43:59 +00:00
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nav_order: 1
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parent: Second Factor
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grand_parent: Features
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---
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# Time-based One-Time Password
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**Authelia** supports Time-base one-time password generated by apps like [Google Authenticator].
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<p align="center">
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<img src="../../images/2FA-TOTP.png" width="300">
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<img src="../../images/google-authenticator.png" width="150" class="no-border" style="margin-left: 50px">
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</p>
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After having successfully completed the first factor, select **One-Time Password method**
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option and click on **Register device** link. This will e-mail you to confirm your identity.
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*NOTE: If you're testing **Authelia**, this e-mail has likely been sent to the mailbox available at https://mail.example.com:8080/*
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Once this validation step is completed, a QR Code gets displayed.
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<p align="center">
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<img src="../../images/REGISTER-TOTP.png" width="400">
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</p>
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You can then use [Google Authenticator] to scan the code in order to register your device.
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From now on, you get tokens generated every 30 seconds that
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you can use to validate the second factor in **Authelia**.
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2021-02-12 05:59:42 +00:00
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## Limitations
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2020-02-29 00:43:59 +00:00
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2021-02-12 05:59:42 +00:00
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Users currently can only enroll a single TOTP device in **Authelia**.
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Multiple single type device enrollment will be available when [this issue](https://github.com/authelia/authelia/issues/275) has been resolved.
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[Google Authenticator]: https://google-authenticator.com/
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