The Battle.net Authenticator offers an additional layer of security against unauthorized account access. You can purchase a physical Authenticator or download our free application on supported mobile devices.
When using the Battle.net Mobile Authenticator, we recommend registering for SMS Protect. This free service allows you to easily remove an authenticator using text message verification.
When you log in to your account, you will receive an authentication request on your device. If the code on your device matches the one on your computer, press Approve to approve the request. If you receive an authentication request that you did not initiate, click Deny and change your Battle.net Account's password.
If you want to use the traditional six or eight-digit numeric code generated by your authenticator, click Use Authenticator Security Code on your computer. Then press Enter code manually on your device to generate an authentication code. Each code is unique and valid only once. If you log in consistently from the same location, you may not be asked for an authenticator code. This makes login faster when you're at a secure location.
If you prefer to enter a code at every login, visit the authenticator page in Battle.net Account Management, and check Require an authenticator code every time you log in to the game.
Note: Classic games are not protected by the Battle.net Authenticator. To make sure your computer is secure, review our Account and Computer Security article.
When using a Mobile Authenticator on an Apple device, we strongly recommend enabling iCloud Keychain. This will save your authenticator's serial number and restore code to Apple's iCloud and allow you to easily restore your authenticator without the need to contact customer support.
If you need to remove your Authenticator for any reason, follow the steps in this article.
Core Hound Pup
The Core Hound Pup is an account-wide pet available to players on realms located in North America, Europe, and Korea. After attaching an authenticator, you'll find the Core Hound Pup waiting in your in-game mailbox.
If you remove your authenticator, the pet will disappear from your collection after you log out. You'll need to reattach an authenticator to receive the pet again.