High-End Poker-Cheating

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Elie Bursztein hat sich in China ein Device zum Bescheißen beim Poker geholt. Das Teil kommt zusammen mit seitlich markierten Karten, die per Infarot-Cam im Handy-ähnlichen Gerät abfotografiert werden. Ist nochmal 'ne Nummer abgefahrener, als die Infarot-Kontaktlinsen vor drei Jahren.

What makes the whole thing work is the use of a special deck in which the four edges of each card are marked with IR-absorbing ink. As a result, when this marked deck is illuminated by the IR LEDs, the spots of ink absorb the IR, creating a sequence of black spots, as visible in the photo above. This can be compared with a regular deck, which shows no markings when illuminated with IR, as visible in the photo as well.

The sequence of black spots created by the IR illumination, illustrated in the photo above, is read remotely by the cheating device to infer a card’s suit and value. You can think of those markings as invisible barcodes. Each card has a unique code, as visible in the photo above, which shows the markings for the six of hearts, six of clubs, six of diamonds, five of diamonds and five of hearts. These markings are repeated on each side of a card.

Hier ein paar der Slides aus seiner Präsentation auf der DefCon24:

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