The problem is that RFID technology, although good for inventory tracking as a replacement for barcodes, is not well suited for security, Kaminsky said.

"The technology is very convenient, but don't interpret the convenience as security," Kaminsky said. "At the end of the day, many companies are essentially using barcode technology to control access to their facilities. I'd posit that perhaps there are more secure technologies out there."

HID recommends that customers who are concerned about cloning upgrade to one of HID's smart card products, which do encrypt transmissions between card and reader and are more difficult to hack, Carroll said.

HID also recommends that companies that use the cards train their employees to look for suspicious activity that might indicate that someone is trying to clone or spoof access cards.

As for Paget's presentation, Moss expressed frustration over HID's actions, especially given the widespread attention to RFID security holes.