BlackBerry has purchased a German security firm that counts Angela Merkel as one of its customers in a bid to reinvigorate its enterprise mobility management portfolio. Secusmart was snapped up for an undisclosed sum. The acquisition comes as the Canadian company is aiming to reinvent itself as the most secure handset manufacturer. Both Google and Apple have made it clear that they view the enterprise segment as the next big market to go after following the release of Android L and the recent IBM announcement for Apple.