A system is provided for securing data on a mobile device that supports both enterprise and personal applications. The area extracting part extracts a contact area of the sensor and a finger based on the contact information detected by the sensor. The castellation blocks and inputoutput pads are encapsulated and held in place by an encapsulant. It is monitored whether the sheet sensor has detected a sheet and a timer starts counting a first elapsed time from a time point at which the sheet sensor detects a sheet.