OV Chipkaart Mifare chip hack explained

Now here’s a nice video in which some German hackers explain how they analyzed and hacked the Mifare chip that is about to be used in the chipcard for Dutch public transportation. Although each chip has a unique ID the Germans show how they can alter the key so it card behaves as another card with another unique ID. So the ID can’t be changed but using the key a card can be cloned. They will publish full details somewhere next year. As they say it: “start migrating now”. Video is about one hour.

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