[jonathankoren]

The dots are just there for shoulder surfing and to give a visual feedback to the user.

If you want to steal a password, all the cool kids use a microphone or your phone's accelerometers.

https://arxiv.org/abs/1609.09359

https://www.cise.ufl.edu/~traynor/papers/marq-ccs11.pdf

https://phys.org/news/2017-04-criminals-pin-tracking-motion....

[carapace]

Those are much more recent attacks. We're talking about a time when CRT screens were the norm, they are noisy enough to read from quite a distance.

> A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, which emit electron beams that are manipulated to display images on a phosphorescent screen.

https://en.wikipedia.org/wiki/Cathode-ray_tube

That causes a bit more signal than a keyboard, mic, or MEMS accelerometer, eh? :)