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, you'll be prompted for the six or eight-digit numeric code generated by your authenticator. 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.
Check Remember this computer for 30 days during login to temporarily disable the need for an authentication code. Do not check this box if you are on a shared or public computer.
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.
Article ID: 100588