Fully Integrated Passive UHF RFID Tag for Hash-Based Mutual Authentication Protocol.

Area of Science:

• Electrical Engineering
• Computer Science
• Cryptography

Background:

• Passive RFID tags are widely used, but security and privacy concerns hinder market growth.
• Existing privacy-preserving protocols lack comprehensive evaluation of the entire RFID tag system.
• The need for secure and private RFID solutions is critical for future applications.

Purpose of the Study:

• To implement and evaluate a fully integrated passive Ultra-High Frequency (UHF) RFID tag.
• To assess the performance of a privacy-preserving mutual authentication protocol on the integrated tag.
• To analyze the impact of cryptographic hash functions on tag performance and communication distance.

Main Methods:

• Designed a single-chip solution integrating analog front-end and digital processing blocks for the RFID tag.
• Implemented a privacy-preserving mutual authentication protocol utilizing both lightweight (80-bit) and standard (128-bit) hash functions.
• Evaluated tag performance, specifically the reader-tag communication distance, under different hash function configurations.

Main Results:

• The integrated RFID tag successfully completed the authentication protocol.
• A communication distance of 10 cm was achieved using the lightweight hash function.
• A communication distance of 8.5 cm was achieved using the standard hash function, demonstrating a trade-off between security and range.

Conclusions:

• A fully integrated passive UHF RFID tag capable of running privacy-preserving authentication protocols has been successfully demonstrated.
• The choice of hash function significantly impacts the tag's power consumption and effective communication range.
• This research addresses a critical gap in evaluating complete RFID tag systems for secure and private applications.