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HSI-WEN WANG, REN-GUEY LEE, CHUN-CHIEH HSIAO+ AND GUAN-YU HSIEH
Department of Electronic Engineering
National Taipei University of Technology
Taipei, 106 Taiwan
+Department of Electrical Engineering
National Taiwan University
Taipei, 106 Taiwan
+Department of Computer Information and Network Engineering
Lunghwa University of Science and Technology
Taoyuan, 333 Taiwan
Radio frequency identification (RFID) systems have recently been used in a large
number of applications. Security and privacy issues have also imposed significant challenges
on these systems. Cryptography and authentication protocols have been utilized to
effectively solve the security and privacy problems in RFID systems.
In this paper, we integrate public key encryption, embedded computation, and wireless
communication technologies into the active RFID system that we proposed with
cryptography and authentication mechanisms. In our proposed active RFID system, a secure
RFID Tag intermittently transmits cipher text to a RFID Reader which then transmits
in multi-hop relaying to a back-end platform to perform data comparison for authentication.
In addition, the digital signature scheme ¡V Tame Transformation Signatures
(TTS) has the advantages of high security, high-speed key generation, signature, and
suitability to embedded systems and is thus suitable to be used in our authentication system.
It is used in our proposed system to protect the plain text. The TTS algorithm is
from the family of asymmetric public key systems and thus has superiority such as better
security, fast key generation, complex algorithm, and low signature delay. The TTS algorithm
can thus encrypt data and perform authentication more effectively in active RFID
systems.
We have three major contributions in this paper. The first is to fully design and implement
an active RFID system which includes active Tags and Readers. In our system,
the Tag can stand by and keep working in long term after getting started. The second is to
successfully implement a proposed active RFID system with TTS cryptography and authentication
mechanisms to protect the content in tags to ensure the security in multi-hop
transmission. The last is to adopt multi-hop relays to extend distance between Readers.
Received May 30, 2008; revised March 26 & May 25, 2009; accepted July 10, 2009.
Communicated by Tzong-Chen Wu.
* This study is conducted under the Service Ecosystem Research Value Engineering (SERVE) Program of the
Institute for Information Industry which is subsidized by the Ministry of Economy Affairs of R.O.C.