The popularity of games developed by Blizzard Entertainment make user accounts a high profile target. Especially World of Warcraft, but also games such as Diablo 3 or Starcraft 2 are sought after by hackers, often in an effort to transfer and sell virtual items like character equipment and gold. Not only do hacked users lose items that they have often spend a considerable amount of time gathering but also access to the account itself which often leads to days of uncertainty before account access can be recovered.
Blizzard, just like Google or Dropbox, has created an application to add a second authentication layer to the sign in process. The method, often referred to as 2-factor authentication or 2-step authentication, protects the login by not only asking for the account username and password, but also for a temporarily created code that is only valid for a short period of time.
Android smartphone owners can install the Battle.net Authenticator app for their device to create codes on the fly when needed. This makes it a lot harder for attackers to gain access to the account, as they not only need to steal the username and password, but also the code that is generated on the smartphone. Several popular attack forms such as phishing won't work if the account is protected by authenticator.
It takes three steps to set up the additional layer of defense for your Blizzard battle.net account.
When you log in to a recent Blizzard game such as Diablo 3, Starcraft 2 or World of Warcraft, you are asked to enter the current code generated by the application on your phone after you enter your username and password. Note that older battle.net games such as Diablo 2 or Warcraft 3 are not supporting the authenticator.
You can disable the authenticator at any time from the Security Options menu.
Note that you need access to the application to do so. The only recovery options that you have besides that is to use the official support site, contact Blizzard by phone, or, in case you have configured the SMS Protect service, by using that service. More information about the process can be found on this page.
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