> For the complete documentation index, see [llms.txt](https://docs.greennode.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.greennode.ai/getting-start-with-vng-cloud-account/two-factor-authentication-2fa.md).

# Two-Factor Authentication (2FA)

**Step 1**: Log in to the [Account management page](https://dashboard.console.greennode.ai/). From the account management functions menu, select "**2FA**".

<figure><img src="/files/wNCyB87RKXSz2hIdO6ca" alt=""><figcaption></figcaption></figure>

**Step 2**: Select the "2FA" function.

Turn on the desired authentication method as shown in the image.

<figure><img src="/files/iIRdW2mGH7mXDexgsSy5" alt=""><figcaption></figcaption></figure>

There are 2 methods to receive OTP: via SMS or through the Google Authenticator app.

1.1 Send OTP to your phone (via SMS): You can Enable/Disable this function through the button in the "Send OTP to phone" section.

**Note:** Customers with **phone country codes different** from Vietnam (+84) cannot use the SMS method.

1.2 Receive OTP via the Google Authenticator app.

<figure><img src="/files/ywAAm6wSmHmQUAMuNlky" alt=""><figcaption></figcaption></figure>

* Click the **INITIATE** button, you will be taken to the Google Authenticator code creation page and follow the instructions.
* Click **Save Settings** to complete.
* You will receive a notification that **you have completed** as shown in the image.

<figure><img src="/files/5rqUnCuLnP1xMzi36xit" alt=""><figcaption></figcaption></figure>

On the **Multi-Factor Authentication** screen, simply Enable/Disable the function according to your needs, you can choose one of the two or both. Here we support you in creating a new QR code, click on the link and follow the instructions.

<figure><img src="/files/xJkmkXFqeIkeKDk2QlTR" alt=""><figcaption></figcaption></figure>

Finally, click the **Save Settings** button to complete.

**(\*)** After completing the multi-factor authentication registration process, at the login step, depending on the customer's choice above, there will be different authentication methods.

* For receiving OTP via SMS (only applicable to phone numbers with country code (+84) - Vietnam), we will send a message with OTP to the phone number you registered, you just need to enter the received code to authenticate Login.
* For logging in through Google Authenticator. Please open the Google Authenticator app on your device and copy the 6-digit PIN displayed in the app and enter it into our required form.
* In the case of choosing authentication through both of the above options. You simply follow the 2 steps above to authenticate Login.