Implementation of a modified lightweight cryptographic TEA algorithm in RFID system

RFID systems, similar to other wireless systems, are inherently susceptible to security and privacy related attacks. The Tiny Encryption Algorithm (TEA) is a suitable lightweight cryptographic algorithm used in medium security systems such as RFID systems. However, TEA has few weaknesses, most notably from equivalent keys and related-key attacks. So, a Modified TEA algorithm (MTEA) is proposed which uses the Linear Feedback Shift Register (LFSR) to overcome the security weakness of the TEA algorithm against attacks. In this paper an implementation of MTEA algorithm is presented and benchmarked with the standard TEA algorithm considering the area and power consumption.