Once associated with a World of Warcraft account, the Authenticator will provide a six-digit code that must be provided when logging into the game. Valid for one use only, each code is generated on the press of a button on the front of the Authenticator. The device can be linked to multiple accounts.

The Blizzard Authenticator will debut at this weekend's Blizzard Worldwide Invitational event, retailing for $6.50. The device will be made available on Blizzard's online store at the same price soon thereafter.

The additional layer of security will likely be a relief to those players who have invested countless hours into their characters. World of Warcraft has been fraught with reports of account theft and security breaches since the wildly popular PC MMO's 2004 release.