# Authenticating

## About

Authentication is a process to continue taking part in the Humanode consensus protocol. The protocol requires periodically to pass biometric verification to check liveness behind the address. In case your node goes offline for more than 1 epoch, you should make authentication as well. 

## How to do it

Your node should be already running, synced with the network and the [enrolling](https://gitbook.humanode.io/docs/bioauth/enrolling "mention") is done.

Scan the QR code and open the web app on your phone.

{% tabs %}
{% tab title="Launcher" %}
The QR code should appear on the dashboard.
{% endtab %}

{% tab title="CLI" %}
See the `humanode-peer bioauth authurl --help` and use that command with proper flags. Don't forget to set the `--chain` option properly.
{% endtab %}
{% endtabs %}

As a result, you should be able to see the following web page on your phone.

<figure><img src="https://877635606-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzrqdNEWk4W56lbUfbpyD%2Fuploads%2F6hsTFPvUnAth04e3pM7F%2Fphoto_2022-11-14%2017.29.44.jpeg?alt=media&#x26;token=825842b2-5a12-44fc-9771-086ace9a8068" alt=""><figcaption></figcaption></figure>

Click on **AUTHENTICATE** tab.

<figure><img src="https://877635606-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzrqdNEWk4W56lbUfbpyD%2Fuploads%2FuXN898dknD07GdGUkskJ%2Fphoto_2022-11-14%2017.30.40.jpeg?alt=media&#x26;token=93b998ab-6f87-404f-b142-90ae14a88254" alt=""><figcaption></figcaption></figure>

Then you will be prompted to pass the biometric verification.

<figure><img src="https://877635606-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzrqdNEWk4W56lbUfbpyD%2Fuploads%2FMG9PWioU0c4hHE2KuzJp%2Fphoto_2022-11-14%2017.29.55.jpeg?alt=media&#x26;token=2a5bf2a9-950a-4d0b-bc07-4fa918169c97" alt=""><figcaption></figcaption></figure>

To pass the biometric verification make sure that there is enough light and the picture is clear. Click on **I"M READY** and pass the verification.

<figure><img src="https://877635606-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzrqdNEWk4W56lbUfbpyD%2Fuploads%2FzC8BXWWwW1yss5BrikqP%2Fphoto_2022-11-14%2017.29.57.jpeg?alt=media&#x26;token=1b16cebf-31f7-4c4a-89d2-3e802e586924" alt=""><figcaption></figcaption></figure>

Finally, if everything is ok you will get

<figure><img src="https://877635606-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FzrqdNEWk4W56lbUfbpyD%2Fuploads%2FlHIeBi2ifcL0WivBgGCn%2Fphoto_2022-11-14%2017.30.44.jpeg?alt=media&#x26;token=caf2cca9-6980-4a63-afad-79645fd05d27" alt=""><figcaption></figcaption></figure>

In case having errors, please check the troubleshooting page.

{% content-ref url="../help/troubleshooting" %}
[troubleshooting](https://gitbook.humanode.io/docs/help/troubleshooting)
{% endcontent-ref %}