My AccountTwo-step Login

Field Guide to Two-Step Login

Two-step login (also called two-factor authentication or 2FA) is a common security technique used by websites and apps to protect your sensitive data. Websites that use two-step login require you to verify your identity by entering an additional "token" (also called verification code or one-time password (OTP)) besides username and password, typically retrieved from a different device.

Without physical access to the token from your secondary device, a malicious actor would be unable to access the website, even if they discover your username and password:

Basic Two-step Login flow
Basic Two-step Login flow

Commonly, websites or apps with sensitive data (for example, your online bank account) will attempt verify your identity outside of the login screen by:

  • Sending a token in an SMS / text message to the mobile device on-file.

  • Asking for a token generated by an Authenticator app (for example, Authy) on your mobile device.

  • Looking for a token from a physical security key (for example, Yubikey).

How should I use two-step login?

Security often involves a tradeoff between protection and convenience, so ultimately it's up to you! Generally, the two most critical ways to use two-step login are:

  1. To secure Bitwarden

    Secure all vault data by requiring a secondary step each time you log in to Bitwarden, in addition to entering your master password.

  2. To secure important websites

    Secure an individual website by requiring a temporary one-time password (TOTP) when you log in. You can store and generate TOTPs with Bitwarden.

Securing Bitwarden

Since your password manager stores all of your logins, we highly recommend that you secure it with two-step login. Doing so protects all of your logins by preventing a malicious actor from accessing your vault, even if they discover your master password.

Enabling two-step login will require you to complete a secondary step each time you log in, in addition to your primary log in method (mater password). You won't need to complete your secondary step to unlock your vault, only to log in.

Two-step Login to access Bitwarden
Two-step Login to access Bitwarden

Bitwarden offers several two-step login methods for free, including:

  • FIDO (any FIDO2 WebAuthn certified key)

  • via an authenticator app (for example, 2FAS, Ravio, or Aegis)

  • via email

For premium users, Bitwarden offers several advanced two-step login methods:

  • Duo Security with Duo Push, SMS, phone call, and security keys

  • YubiKey (any 4/5 series device or YubiKey NEO/NFC)

Learn more about your options or get help setting up any method using our Setup Guides.


Bitwarden does not support SMS 2FA due to vulnerabilities, including SIM hijacking. We do not reccomend SMS 2FA for other accounts unless it is the only available method. Any second factor is reccomended over having none, but most alternatives are safer than SMS 2FA.

Securing important websites

Many other websites and apps have two-step login options, this is especially common for websites that store sensitive information (for example, credit card or bank account numbers). Most website's two-step login option will be located in the Settings, Security, or Privacy menus.

Activating two-step login will typically open a QR code, like this example from Reddit:

2FA QR Code
2FA QR Code

Scanning this code with an authenticator app will enable the app to generate rotating six-digit tokens that you can use to verify your identity, like this one generated by Authy:

TOTP Token
TOTP Token

Use Authy

To setup two-step login for Reddit using Authy, tap the Add Account button and scan the QR code presented by your website or app. Scanning the QR code will generate your six-digit token. Enter this code in the Verification Code input box to finish setting up.

Two-step Login using Authy
Two-step Login using Authy

Typically, you will be given the option to download recovery codes. Downloading recovery codes is critical to prevent you from losing access to your two-step login tokens, even if you lose the device Authy is installed on.

Next time you login to Reddit, you will be required to verify your identity by entering a verification code from Authy. Verification codes rotate every 30 seconds, so it will be impossible for a malicious actor to discover your code without physical access to your device.


Authy is our recommended authenticator app because it includes backups for any device. Backups prevent you from losing access to your tokens, even if you lose the device Authy is installed on. Flip the Authenticator Backups toggle on the Accounts screen of the Authy app to use this feature.

Other authenticator apps include Google Authenticator and FreeOTP, and as of May 7, 2020 Google Authenticator includes verification code portability across Android devices.

Use Bitwarden authenticator

As an alternative to Authy, Bitwarden offers a built-in authenticator for premium users, including members of paid organizations (families, teams, or enterprise).

Bitwarden for iOS and Android can scan QR codes and generate six-digit tokens just like other authenticator apps. Using Bitwarden authenticator to secure a website will save a rotating six-digit token with that login vault item. You can also manually save your verification code secret to a vault item from any Bitwarden app.

Two-step Login using Bitwarden
Two-step Login using Bitwarden

Learn how to use Bitwarden authenticator.

Why use Bitwarden authenticator?

Understandably, some users are skeptical about using Bitwarden for token authentication. Remember, security often involves a tradeoff between protection and convenience, so the best solution is up to you. Generally, folks that use Bitwarden authenticator do so for two reasons:

  1. Convenience

    When you use Bitwarden mobile apps or browser extensions to auto-fill a username and password, it will automatically copy the verification code to your clipboard for easy pasting.

    If you are using a browser extension, you can chain together the login keyboard shortcut (Windows: Ctrl + Shift + L / macOS: Cmd + Shift + L ), following by the paste shortcut (Windows: Ctrl + V / macOS: Cmd + V) for lightning-fast logins.

  2. Sharing

    For organizations, a large benefit of using the Bitwarden authenticator for token verification is the ability to share the token generation among team members. This allows organizations to protect their accounts with two-step login without sacrificing the ability for multiple users to access that account or requiring coordination between two employees to share tokens in an unsafe way.

2FA security keys and passkeys

FIDO2 security keys are a popular and secure option for adding 2FA to your Bitwarden account. If you are not familiar with FIDO2 security keys, see the FIDO Alliance website for additional information regarding FIDO2.

A YubiKey device is a security key that works with FIDO authentication protocols, and can have several use cases. Two uses are as 2FA security keys, or passkeys.

  • 2FA security key: Using a YubiKey as a 2FA security key will act as an additional device in the authentication process. This will be accompanied by another primary method of authentication (such as master password). The YubiKey security key must be physically plugged in to provide the authentication credentials.

  • Passkey: A passkey is a pair or public-private cryptographic keys that are used to authenticate a login. Instead of creating a username, password and adding 2FA to an account, the single passkey is used. During passkey creation, the YubiKey is able to work as the passkey generator to create the public and private keys necessary for passkey login. Learn more about using a YubiKey as a passkey here.

With Bitwarden, the primary use of a security key such as a YubiKey device is to provide 2FA authentication.

Next steps

Now that you are a two-step login expert, we recommend:

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