Mobile devices like Smartphone's and tablets are not only designed for private use, but also for business use as well. Mobile solutions, such as mobile enterprise resource planning and mobile business intelligence, are now-a-days becoming more common. However, without strong consideration of security, especially in mobile devices, these solutions would be very risky. Enterprise data are classified in security levels, in which security threats and countermeasures are grouped. These levels indicate the fulfillment degree of the security objectives in each group.