Apparatus and methods are disclosed for simultaneously tracking multiple finger and palm contacts as hands approach, touch, and slide across a proximity-sensing, multi-touch surface. To that end, stored encrypted data is converted in the storage system with new set of cryptographic criteria. The first cam barrel is formed with 3rd- and 4th-lens-group guiding cams, the linear-shuttle barrel is formed with 2nd-lens-group guiding cams, the zooming relay barrel is formed with 1st-cam-barrel guiding cams, the second cam barrel is formed with 1st-lens-group guiding cams, and the focusing cam barrel is formed with 2nd-lens-group focusingguiding grooves and 2nd-lens-group guiding grooves. Further, the processes of determining the threshold and reading out the side edge position are executed after driving of the registration roller pair is resumed. The method comprises administering to a subject in need an effective amount of a compound represented by: 1and physiologically acceptable salts thereof.