Official Blizzard Battle.net Authenticator US Only Security Key/RSA Token Creator Official Blizzard Authenticator with Blizzard Logo Style. Provides for the Highest Account Security Available in the Game Industry Today. Secures Your World of Warcraft, Starcraft, Diablo, and other Accounts on Battle.net Simple and Easy to use, Small and Convenient to Carry, Tough and Durable to Last for Years. USA Only Authenticator - Does Not Work on European Servers or Accounts.