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coach handbag styles Mark Gillenson.Gillenson calls it technology run wild, and called WREG's findings compelling."It's potentially a major problem," he said. "I think people do need to be concerned and should be aware, and we'll see if this becomes a major problem."WREG contacted several credit card issuers for comments about RFID technology.Discover said its Discover Zip contactless card, unlike RFID, is designed to operate only at very short ranges (less than 2 4 inches). Using RF enabled technology, the card "has a unique security feature in that the verification code changes each time you use it so that any skimmed data could not be reused."American Express told WREG that it is confident in the security of its RFID technology, called ExpressPay. Its says ExpressPay contains a unique "key" that generates a different digital signature for each transaction that cannot be copied, overwritten or read. The ExpressPay key creates an unbreakable cryptogram, ensuring the ExpressPay device is legitimate. "We believe that the cryptogram is the best technology available today for ensuring the integrity of ExpressPay transactions and minimizing the risk of fraud," American Express said.MasterCard said that its PayPass cards and devices "are as secure as paying with traditional MasterCard cards that have magnetic stripe technology. In fact, many consumers claim that they feel more secure with PayPass because they never