US wineries are using radio frequency identification (RFID) technology to combat counterfeit in the winemaking industry.According to Payne Security, a company that develops anti-counterfeiting measures for the wine industry, RFID tags are placed inside wine bottle labels and can also carbon date wine to ensure authenticity. “The people who are counterfeiting are getting more sophisticated as time goes by,” says Charles Curtis, head of North American wine sales for Christie's in New York.