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44 lines
1.9 KiB
Markdown
44 lines
1.9 KiB
Markdown
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---
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title: "One Time Password"
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description: "Authelia utilizes one time passwords as one of it's second factor authentication methods."
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lead: "Authelia utilizes one time passwords as one of it's second factor authentication methods."
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date: 2022-03-20T12:52:27+11:00
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draft: false
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images: []
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menu:
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overview:
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parent: "authentication"
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weight: 230
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toc: true
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aliases:
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- /docs/features/2fa/one-time-password.html
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---
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__Authelia__ supports time-based one-time password generated by apps like [Google Authenticator].
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{{< figure src="2FA-TOTP.png" caption="An example of the time-based one time password authentication view" alt="Second Factor OTP Authentication View" width=300 >}}
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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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{{< figure src="REGISTER-TOTP.png" caption="An example of the time-based one time password registration view" alt="Second Factor OTP Registration View" width=400 >}}
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You can then use [Google Authenticator] or an authenticator of your choice to scan the code in order to register your device.
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{{< figure src="google-authenticator.png" caption="The Google Authenticator application" alt="Second Factor OTP Registration View" width=150 >}}
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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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## Limitations
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Users currently can only enroll a single TOTP device in __Authelia__. This is standard practice, as a user can obviously
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register a second device with the same QR Code. As there is no tangible benefit and it is harder to keep track of
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multiple devices it's not a feature we will implement.
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[Google Authenticator]: https://google-authenticator.com/
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