As the implementation of radio frequency identification, RFID, tagging of pallets and cases for the retail supply chain proceeds, attention is being given to the possibility of RFID tagging for individual retail items. The sale of tagged retail goods gives rise to measures to enhance consumer privacy. Ultra-high frequency tags may be read by wireless means of distances up to around 30 feet (10 meters). High frequency tags also may be read wirelessly, but generally at a shorter range. Mechanisms have been proposed to address enhanced consumer privacy upon the introduction of item-level tagging.