The super secure Android smartphone, called Blackphone successfully rooted by  TeamAndIRC in BlackHat Security Conference events, there no special case for Blackphone to root, you  only need ADB toools and it can  be done in less than 5 minutes, realizing that vulnerability  Blackphone team release the update and fix the exploit, Unlike Sony or Samsung we don't need to unlock the bootloader to root the Blackphone, only ADB and it was too easy for a Smartphone that claimed to be the most secure smartphone in the world.
       From this incident The Blackphone company should not boast too much from the imperfect product like Blackphone.