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Playlist "32C3: gated communities"

QRtistry

Henryk Plötz

QR codes have rapidly overtaken rival 2D bar code symbologies and are becoming quite ubiquitous. Most uses are rather pedestrian though, and even the more non-standard modifications to pure QR codes lack a certain technical finesse, opting to just overpaint part of the code and let error correction handle that instead. Let's see how we can do better.