NYPD tests new tool that detects credit card skimmers

Patrick Traynor, a cybersecurity expert, was in New York in February working with police to help identify a way to detect credit card skimmers on ATMs when he got a financial fraud alert: his own information had been stolen while he was in town.

It wasn't the first time. In five years he'd had his personal information stolen by credit card skimmers - devices illegally installed on ATMs and gas station pumps that "skim" consumer credit card numbers - a half-dozen times.

"I've got 15 years of experience in the field of information security. If I can't protect myself reliably, who else possibly can?" Traynor, a computer information science and engineering professor at University of Florida, said.

After three years of study, Traynor and two Florida graduate students invented a device they call the 'Skim Reaper', a credit-card thin gadget that slides into card reader slots and can easily and quickly detect if an ATM or gas pump has been compromised.

The New York Police Department is testing the Skim Reaper with some early success in its effort to rid the streets of the pervasive devices. The AP was given exclusive access to the lab where the Skim Reaper was made, as well as NYPD tests of it in the field.

The Secret Service says skimmers steal more than a billion dollars from US consumers annually, money that often funds organised crime.

Most credit card skimmers work by installing an extra "read head" inside or outside a machine. This extra read head allows criminals to make a copy of the card's information as a consumer swipes it. Skim Reaper was built to detect when more than one read head is present, Traynor said.

The NYPD has four full-time, trained detectives tasked with finding credit-card skimmers installed on ATMs at bodegas, but say the problem is too widespread to be stopped with those resources.

In February, Traynor gave NYPD five Skim Reapers to test. The device looks like a long credit card that can be slid into a card slot in a gas pump or ATM. It's attached by a wire to a cellphone-sized box with a small readout screen that says "possible skimmer!" when multiple read heads are detected.

Part of the attraction to the Skim Reaper is its simplicity. Flanagan said officers in New York recently found the first skimmer using the device at an ATM in Brooklyn.

The advent of debit and credit cards with protective chips that inserted into special readers have helped some retail businesses combat skimming. But the higher cost of the new readers and complexity of switching over to a new technology has been an obstacle for small retail businesses and gas stations where criminals have flourished.

"If indeed this new technology could be done on a cost effective basis, it could put the skimmers out of business. It would save people tremendous amounts of money and aggravation," Weisman said.

Right now, it costs about US$50 to make each Skim Reaper, Traynor said, but his team is working daily to get that number down.

- AP