This is an older article from 2010 regarding the "jitter" technology to provide anti-skimming protection. Overall conclusion is the jitter technology should only serve as a piece of the overall anti-skimming solution. I completely agree. Thereare many ways to protect an ATM or Gas Pump from skimming devices, but how does one prove ROI on a device and how much is one willing to spend on the device or overall anti-skimming solution - PER ATM?
Here's the Jitter Article