5 ms·

You could shrink the keypad and randomly place it on the screen. Or independently change the width and height of the columns and rows of buttons. Or combine the

You could shrink the keypad and randomly place it on the screen. Or independently change the width and height of the columns and rows of buttons. Or combine the two. This would make it harder to guess the PIN from the accelerometer and you could still use your muscle memory. Designers would have a fit though. Edit: though on reflection, this might make no difference. Knowing the relative locations of the key presses is probably enough.

marton78 7y ago
You could move and zoom the keyboard after every key press
Wistar 7y ago
Perhaps randomly changing the layout? Sometimes the keys are presented in a circular format, another in a figure-8, zigzag, odd numbers at the top of the screen, even at the bottom, etc. Another tactic might be to have randomized extra keys that show up in a different color or position that aren't a part of the actual PIN but that must all be pressed, in any order, to intermix in the sequence as the the real PIN is entered in proper order. The extra numbers obfuscate the real PIN. Say, the real PIN is 18145 but 4 extra keys in a distinct color or motif are presented so that the key presses might be 1-8 (real) 8-4 (false) 1-4 (real) 3-6 (false) 5 (real) but the false keys are different each time. It wouldn't matter what order the false keys are pressed or when in the sequence they are pressed as they are ignored by the real PIN mechanism.
- Wistar 7y ago
  ... or, some numbers in the PIN require being pressed some random number of times until the key graphically indicates it is accepted. 1-8-1-4-5 might need to be entered as 1-1-8-1-4-4-4-5-5 with the repeat number differing each time. Or the PIN pad can be presented with a random requirement to slide between 2 or 3 sequential digits rather than lift and tap. Tap-1-Slide-8-1-4-Tap-5.

5 ms·

You could shrink the keypad and randomly place it on the screen. Or independently change the width and height of the columns and rows of buttons. Or combine the

by buckminster 7y ago

marton78 7y ago
You could move and zoom the keyboard after every key press
Wistar 7y ago
Perhaps randomly changing the layout? Sometimes the keys are presented in a circular format, another in a figure-8, zigzag, odd numbers at the top of the screen, even at the bottom, etc. Another tactic might be to have randomized extra keys that show up in a different color or position that aren't a part of the actual PIN but that must all be pressed, in any order, to intermix in the sequence as the the real PIN is entered in proper order. The extra numbers obfuscate the real PIN. Say, the real PIN is 18145 but 4 extra keys in a distinct color or motif are presented so that the key presses might be 1-8 (real) 8-4 (false) 1-4 (real) 3-6 (false) 5 (real) but the false keys are different each time. It wouldn't matter what order the false keys are pressed or when in the sequence they are pressed as they are ignored by the real PIN mechanism.
- Wistar 7y ago
  ... or, some numbers in the PIN require being pressed some random number of times until the key graphically indicates it is accepted. 1-8-1-4-5 might need to be entered as 1-1-8-1-4-4-4-5-5 with the repeat number differing each time. Or the PIN pad can be presented with a random requirement to slide between 2 or 3 sequential digits rather than lift and tap. Tap-1-Slide-8-1-4-Tap-5.