Wow Authentication Key

The wow authenticator is an additional security measure users can add to their account to keep hackers out. The key is generated every 30 seconds, is never the same thing twice, and if extremely hard to crack, although not impossible. It has been known to be vulnerable to the "middle man attack". This is rare though and requires that the user have a Trojan on their computer.

PS. If you were asking for the CD authentication keys, sorry, those are one use only keys. IF you want a key, go out and buy the disc.