Black Hat 2009: How to hack a parking meter

At Black Hat this week, security researchers showed how a technically savvy hacker can make a fake payment card that allows unlimited free parking on San Francisco's smart parking meter system
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How to hack a San Francisco parking meter: This is how a San Francisco parking meter should look; a proper payment card has been inserted to pay for additional parking time. But security researchers at the Black Hat conference have discovered a way to trick the meters into accepting a fake payment card, thereby granting unlimited free parking.

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