stackyFACTSThat complicated block of black and white squares you scan at the door contains absolutely zero personal information about you.
That complicated block of black and white squares you scan at the door contains absolutely zero personal information about you. It is merely a visually encoded string of entirely random digits that temporarily corresponds to a database entry on a remote server. The moment the scanner reads the number, the server flags the entry as used. It is a profoundly dumb, incredibly simple system disguised as high-level digital encryption.
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