A security apparatus having a force-based touch interface includes: a touch input including a touch plate for a touch input and a force sensor spaced apart at a predetermined distance by a connection member in a direction perpendicular to a touch surface of the touch plate and measuring a pressing force applied to the touch plate at a plurality of measurement points; and a processor configured to recognize directions of a shear force using magnitudes of the pressing force measured by the force sensor, to compare the recognized directions of the shear force with directions of a shear force of a previously registered security code, and to determine whether to disable security according to a comparison result.