Thursday, January 19, 2006

Foiling Counterfeiting Countermeasures

Schneier on Security:

Great story illustrating how criminals adapt to security measures.

The notes were all $5 bills that had been bleached and altered to look like $100 bills, sheriff's investigators said. They passed muster with the pen because it determines only whether the paper used to manufacture the currency is legitimate, Bandy said.

As a security measure, the merchants use a chemical pen that determines if the bills are counterfeit. But that's not exactly what the pen does. The pen only verifies that the paper is legitimate. The criminals successfully exploited this security hole.

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