Foe (IFF), was invented by the British in 1939 and used extensively by the Allies during World War II to identify and authenticate allied planes and other vehicles. RFID is being used today for the same purposes. However, it is now also recog- nized that an investment in RFID technology can improve the efficiency of many enterprise operations, reduce errors, and improve on operating costs. With RFID, any movable item or asset can be identified and tracked better and more efficiently. The first RFID systems deployed for tracking and access applica- tions entered the marketplace during the 1980s. As the technology matures, it is clear that we can expect more pervasive and most likely more invasive applications for RFID. Industry analysts predict explosive growth for RFID over the next several years, forecasting that by 2010, there will be some 33 billion tags produced, com- pared to just 1.3 billion in 2005. Retail, automotive, and pharmaceutical compa- nies are expected to lead in the adoption of RFID. Several organizations are involved in drafting standards for RFID technology. Both the ISO (www.iso.org) and EPCglobal (www.epcglobalinc.org) have had many initiatives related to RFID standards. EPCglobal is an important organization to the RFID movement: It is leading the development of industry-driven standards for the electronic product code (EPC) to support the use of RFID in today's fast- moving, information-rich trading networks. It is a subscriber-driven organization WPANs comprising industry leaders and organizations, focused on creating global stan- dards for the EPCglobal network. Currently, the purpose of an RFID system is to allow a tag to transmit data to an RFID reader, which then processes the data according to the application requirements. The information transmitted can provide identification or location data and can also include more specific information, such as date of purchase, price, color, size, and SO on. RFID tags are envisioned as a replacement for universal product code (UPC) barcodes beca