Saturday | 22 November, 2008
RFID chipmaker loses suit; tells users to take urgent action
Dutch court rules that university can publish research findings on RFID encryption flaws
Sharon Gaudin 24/07/2008 08:22:37
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Nohl said the problem lies in what he calls weak encryption in the MiFare Classic card. In March, he said that once he had broken the encryption, he would need only a laptop, a scanner and a few minutes to get the cryptographic key to an RFID door lock and create a duplicate card to open it at will.

Since the MiFare Classic smart cards use a radio chip, Nohl said he easily can scan them for information. If someone came out of a building carrying a smart card door key, he could walk past them with a laptop and scanner in a backpack or bag and skim data from their card. He also could walk past the door and scan for data captured to the reader.

Once he's captured information from a smart card and/or the card reader on the door, he would have enough information to find the cryptographic key and duplicate a smart card with the necessary encryption information to open the door. He said the whole process would take him less than two minutes.

Ken van Wyk, principal consultant at KRvW Associates, said in an earlier interview that one European country had deployed soldiers to guard some government facilities that used the MiFare Classic chip in their smart door key cards.

"Deploying guards to facilities like that is not done lightly," he said. "They recognize that they have a huge exposure. Deploying guards is expensive. They're not doing it because it's fun. They're safeguarding their systems." Van Wyk declined to identify the European country under discussion.

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