Security experts managed to infect a Radio Frequency ID (RFID) tag with a computer virus:
"This is intended as a wake-up call," said Andrew Tanenbaum, one of the researchers in the computer science department at Amsterdam's Free University that did the work revealing the weaknesses on smart tags.
"We ask the RFID industry to design systems that are secure," he said.
RFID tags are essentially smart barcodes that replace the familiar lines with a small amount of computer memory, a tiny processing unit and a radio. Information is downloaded into the tag and read off it via radio.