Includes bibliographical references and index.

RFID (radio frequency identification) has been deployed in the billions to track objects through the global economy and is used to manage and monitor public transportation systems, store identifying information in biometric passports, communicate sensor information about infrastructure and food safety, power contactless "smart" cards, and provide essential identification functions for the growing Internet of Things. RFID tags can be as small as a grain of rice and sown into clothing or embedded in packaging--even inside animal and human bodies. They are found in credit cards, key fobs, car windshields, your T pass, consumer electronics, the walls of tunnels--and yet, most people are unaware of their presence.