WoW - Blizzard Authenticator
Blizzard made security gadget for WoW players. More questions on the gadget answered on their FAQ.
What is the Blizzard Authenticator?
The Blizzard Authenticator is an optional tool that offers World of Warcraft players an additional layer of security to help prevent unauthorized account access. The Authenticator itself is a physical “token” device that fits easily on a keyring.
Where do I get a Blizzard Authenticator?
The Blizzard Authenticator will be able to be purchased directly from the Blizzard Store for $6.50 *Coming Soon*.
How does the Blizzard Authenticator work?
You must first associate the Blizzard Authenticator to the World of Warcraft account you play. Once the account has been linked, the Authenticator token will be required to log in to Account Management or to the game; when logging in, you will be prompted to supply a digital code generated by the Authenticator.