Blizzard Entertainment has recently improved security for Battle.net & Blizzard accounts. Due to recent and unfortunate events that have been going on, with people losing their accounts to hackers; Blizzard has improved the functionality of its security app, Battle.net Mobile Authenticator [Free]. This app works for all Blizzard games, including Hearthstone: Heroes of Warcraft.
So what does Battle.net Mobile Authenticator offer? The app provides you with a two factor authentication system which doubles security on your account. It also provides you with a one-touch button that allows you to approve or decline any login attempt. Of course, it works provided that an internet connection is available. You can get the app for your smartwatch, phone, or tablet; grab it now if you are a Hearthstone player.