Not sure if everyone knew this or not but i didnt and got hacked for it.
this was in a Customer Service ticket i got back
"The Dial-In authenticator only protects your World of Warcraft account and Battle.net account management page. It does not work for
Diablo III or Starcraft 2 accounts, by design. To help protect your account, we recommend following our Account Security Checklist:
Let me know if you have any further questions.