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Shmoocon Demo Shows Easy, Wireless Credit Card Fraud

Sparrowvsrevolution writes with this excerpt from a Forbes piece recounting a scary demo at the just-ended Shmoocon: "[Security researcher Kristin] Paget aimed to indisputably prove what hackers have long known and the payment card industry has repeatedly downplayed and denied: That RFID-enabled credit card data can be easily, cheaply, and undetectably stolen and used for fraudulent transactions. With a Vivotech RFID credit card reader she bought on eBay for $50, Paget wirelessly read a volunteer's credit card onstage and obtained the card's number and expiration date, along with the one-time CVV number used by contactless cards to authenticate payments. A second later, she used a $300 card-magnetizing tool to encode that data onto a blank card. And then, with a Square attachment for the iPhone that allows anyone to swipe a card and receive payments, she paid herself $15 of the volunteer's money with the counterfeit card she'd just created. (She also handed the volunteer a twenty dollar bill, essentially selling the bill on stage for $15 to avoid any charges of illegal fraud.) ... A stealthy attacker in a crowded public place could easily scan hundreds of cards through wallets or purses."

5 of 273 comments (clear)

  1. Re:Is this news? by Jeng · · Score: 5, Insightful

    It is news in that this has now been brought up to the credit card companies in a manner which cannot be easily ignored.

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  2. FUD by OverlordQ · · Score: 5, Insightful

    In fact, contactless cards do offer one security feature traditional cards don’t: Along with the card’s 16-digit number and expiration date, the cards are set to offer up a one-time CVV code with every scan. Those codes can only be used for one transaction, and have to used in the order they’re generated. If a payment processor that detects multiple transactions with the same code or codes being used to make transactions in the wrong order, it will disable the card. So a contactless card scammer can only use each stolen number for one transaction, and if the victim of a the scam uses the card again before the thief has time to make a fraudulent payment, all transactions on the card will be blocked.

    You should be more worried about waiters and cashiers then somebody in a crowd grabbing your data.

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  3. Re:Mitigating factors by berashith · · Score: 5, Insightful

    The issue isnt being able to mitigate, the issue is that if the CC companies convince everyone that this isnt possible, then they have an easy path to never having to pay out against fraud. They can just refuse to believe this exists, and tell anyone who had their card info stolen that the cause was their behavior, and then never have to honor a dime of repayment. This is enough to let everyone know that theft can occur this way, and liability remains with the CC companies.

  4. Re:Glossing over one problem... by CimmerianX · · Score: 5, Insightful

    >> the cards are set to offer up a one-time CVV code with every scan

    Wait, I thought RFID only offered up static information. Does this infer that the cards have some sort of logic onboard to generate these 'one-time codes' and have create a new code on every scan that matches up with its processor? How does this effect an inadvertent scan, do the codes get all out of sync? Is there resync logic as well? How would this be handled throught payment processors and 3rd party clearing houses?

    Now, someone enlighten me on this if it's true. But this sounds to me like total bullcrap.

  5. Re:Is this news? by Joce640k · · Score: 5, Insightful

    Why is it "hyperbole" if somebody can drain hundreds of bank accounts wirelessly with a $50 device?

    To me that sounds more like "panic stations, block all cards now!!"

    Why anybody needs RFID credit cards is beyond me anyway. Is it sooooo hard to swipe a card through a reader?

    PS: Why would the CVV number be on the RFID chip? Surely that's the secret only you and the company are supposed to know?

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