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+---
+layout: article
+title: Set up two-step login with Duo Security
+categories: [Getting Started, Account Management]
+featured: false
+popular: true
+tags: [two-step login, 2fa, two factor authentication, account, duo, sms]
+---
+
+bitwarden has partnered with Duo Security to bring two-factor authentication to bitwarden logins, complete with [inline self-service enrollment](https://guide.duo.com/enrollment){:target="_blank"} and [authentication prompt](https://guide.duo.com/prompt){:target="_blank"} (offering SMS, phone call, U2F security keys, and push notifications with the Duo Mobile app).
+
+## Overview
+
+This article takes you through configuring your bitwarden Premium account to use Duo two-factor authentication services via [Duo Push](https://duo.com/product/trusted-users/two-factor-authentication/duo-mobile){:target="_blank"}. You'll sign up for a Duo account, configure bitwarden to use your new Duo account, and enroll your bitwarden account and your device for use with Duo's service.
+
+Once you complete this process, Duo Security's two-factor authentication platform protects access to your bitwarden data by requiring two-step approval when logging in to your bitwarden vault.
+
+## Create a Duo Security Account
+
+A Duo account is required to use this feature. A Duo account account for up to 10 users can be created for free.
+
+1. If you do not already have one, sign up for a new Duo account at <https://signup.duo.com/>
+2. Log in to the Duo Admin panel with your Duo account at <https://admin.duosecurity.com/login>
+3. In the left menu, navigate to **Applications**, then click the **Protect an Application** button.
+4. Find the **Web SDK** application and click the **Protect this Application** button.
+5. Note the **Integration Key**, **Secret Key**, and **API Hostname** details. We will need to reference these later when configuring bitwarden.
+   {% image two-step/duo/application-details.png %}
+
+## Get the Duo Mobile App
+
+It is recommended to install the free [Duo Mobile](https://duo.com/product/trusted-users/two-factor-authentication/duo-mobile){:target="_blank"} app if you want to take advantage of quickly logging in with push notifications. This is optional, however, since Duo also supports SMS, phone calls, and U2F security keys.
+
+- iOS: [Download on the App Store](https://itunes.apple.com/us/app/duo-mobile/id422663827?mt=8){:target="_blank"}
+- Android: [Download on Google Play](https://play.google.com/store/apps/details?id=com.duosecurity.duomobile){:target="_blank"}
+
+## Enable Two-step Login with Duo
+
+{% warning %}
+Two-step login can permanently lock you out of your account. It is very important that you write down and keep your two-step login **recovery code** in a safe place in the event that you lose access to your normal two-step login methods.
+{% endwarning %}
+
+1. Log in to the web vault at <https://vault.bitwarden.com>.
+2. Click **Settings** on the sidebar. Click **Two-step Login** in the sub-menu that opens under **Settings**.  
+4. Select the **Duo** option and then type in your master password to continue.
+5. Enter the configuration information provided from the Duo Admin **Web SDK** application that was set up earlier: **Integration Key**, **Secret Key**, and **API Hostname**.
+6. Click **Save** to enable Duo.
+7. Click the **Close** button and confirm that the Duo option now shows as **Enabled**.
+
+## Log In, Enroll, and Test
+
+1. Log out of the bitwarden web vault.
+2. Log back into the bitwarden web vault. You should now be prompted with a Duo two-step login option.
+3. Upon your first login using Duo you may be prompted to enroll your bitwarden account and device(s) with Duo. Complete the Duo enrollment process following the on-screen instructions.
+4. Log out of and back in to any other bitwarden applications that you are using to confirm that Duo is properly working. You will eventually be logged out automatically.