Blizzard announced that they would be selling a Blizzard Authenticator a few weeks ago; the Blizzard Authenticator is a small device that is attached to a keychain that has a small display that will generate a 6 digit number once you press a button on it, this number changes every minute. The number is a 1 time password and cannot be reused so key loggers are useless because of it. Despite some controversy of players crying out that they shouldn't have to pay for extra security, the Authenticators sold out immediately. Your account still has the same log-in and password, but without the 6 digit number that follows, a hacker cannot get into your account. The devices are tamper proof, so once cracked opened they will cease to work.

This security system is used by businesses EVERYWHERE, my mom uses it herself at work... at least once a week she calls me because she leaves her key chain at home (which is a 24 digit number) and I have to read it to her over the phone. It's a really good system and I'm sure it works... but I feel like Blizzard isn't looking into more cost free security for World of Warcraft accounts (I have one on my mind).

So my opinion? Buy it if you want the extra security, it’s something like $7, totally worth the money if you don’t want to get key logged.