3 ms·

Seems like an easy solution: randomize the PIN keypad layout with every key press.

• TOMDM 12y ago
  If you wanted to take it a step further, the touch screen could have a very narrow viewing angle, have the angle of the screen automatically or manually rotate to the users eye level, and then someone standing next to you would just see a blank screen. With random keys on top of that, someone would literally have to poke their head over your shoulder to see.
• snogglethorpe 12y ago
  If they're going to do that, they need to do it consistently... Most ATMs around here don't randomize the layout, but every once in a while I come across one that does, and I've found that it's actually quite difficult to use the latter. Apparently I have my PIN memorized mainly through muscle memory... when using the randomized sort I've occasionally resorted to drawing a keyboard and looking at what numbers my fingers hit! ><