spying protection is aimed at securing pin code entry
the location of the keys is newly assigned randomly each time
the presence of an extra pair of eyes but also camera lenses or smartphones in the field of view, or close to the field of view, are detected
this guarentees the secrecy of the entry
the presence of an extra pair of eyes but also camera lenses or smartphones in the field of view or close to the field of view are detected
this guarentees the secrecy of the document
patent US10643198B2