ABSTRACT
User tracking and authentication with radio-frequency identification (RFID) technology have raised many privacy and security concerns that impede the widespread deployment of RFID. On the other hand, known privacy and security cryptographic defenses are too hardware-expensive to incorporate into low-cost RFID tags. To address these concerns, we propose hardware-based approaches to security and privacy in RFID that rely on physical unclonable functions (PUFs). These functions exploit the inherent variability of wire delays and parasitic gate delays in manufactured circuits, and may be implemented with an order-of-magnitude reduction in gate count as compared with traditional cryptographic functions.
