How a QR code works

Re:How a QR code works by wartijn_ on Thursday September 15, 2022 @08:17AM (#32850597)

You could add a button and only generate a QR code if someone presses that button.

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Re:How a QR code works by shard on Thursday September 15, 2022 @03:08PM (#32857018)

Or add a backlight to a transparent QR code which turns on when you press a button. This way a simple sticker over the QR code wouldn't work.

[ Parent | on HN ]