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Information 2015, 6(2), 258-274; doi:10.3390/info6020258

Efficiency and Privacy Enhancement for a Track and Trace System of RFID-Based Supply Chains

College of Computer and Information, Hohai University, Nanjing 210098, China
Department of Computer Science, Taizhou University, Linhai 317000, China
School of Mathematics and Statistics, Guangdong University of Finance & Economics, Guangzhou 510320, China
School of Computer Science, South China Normal University
Author to whom correspondence should be addressed.
Academic Editors: Qiong Huang and Guomin Yang
Received: 2 April 2015 / Revised: 3 June 2015 / Accepted: 4 June 2015 / Published: 11 June 2015
(This article belongs to the Special Issue Cybersecurity and Cryptography)
View Full-Text   |   Download PDF [741 KB, uploaded 11 June 2015]


One of the major applications of Radio Frequency Identification (RFID) technology is in supply chain management as it promises to provide real-time visibility based on the function of track and trace. However, such an RFID-based track and trace system raises new security and privacy challenges due to the restricted resource of tags. In this paper, we refine three privacy related models (i.e., the privacy, path unlinkability, and tag unlinkability) of RFID-based track and trace systems, and clarify the relations among these privacy models. Specifically, we have proven that privacy is equivalent to path unlinkability and tag unlinkability implies privacy. Our results simplify the privacy concept and protocol design for RFID-based track and trace systems. Furthermore, we propose an efficient track and trace scheme, Tracker+, which allows for authentic and private identification of RFID-tagged objects in supply chains. In the Tracker+, no computational ability is required for tags, but only a few bytes of storage (such as EPC Class 1 Gen 2 tags) are needed to store the tag state. Indeed, Tracker+ reduces the memory requirements for each tag by one group element compared to the Tracker presented in other literature. Moreover, Tracker+ provides privacy against supply chain inside attacks. View Full-Text
Keywords: Radio Frequency Identification (RFID); provable privacy; track and trace; unlinkability; supply chain Radio Frequency Identification (RFID); provable privacy; track and trace; unlinkability; supply chain
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Chen, X.; Zhu, Y.; Li, J.; Wen, Y.; Gong, Z. Efficiency and Privacy Enhancement for a Track and Trace System of RFID-Based Supply Chains. Information 2015, 6, 258-274.

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