Blizzard is now offering another layer of security to gamers of World of Warcraft and StarCraft II offering a Dial-in Authenticator.
The Dial-in Authenticator is on offer to any gamers who would prefer to use traditional landlines to keep their accounts safe. The new security system can be used in addition to the already available Battle.net Authenticator and Mobile Authenticator app.
When ever a strange login attempt is made on your account Blizzard will ask you to confirm your account is safe via a toll-free call and may ask if you try to login on a different computer or via a new system.
Blizzard has put together a FAQ about the new Dial-in Authenticator on their website
Via Kotaku