Xiang Shen

Fudan University, Shanghai, Shanghai Shi, China

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Publications (4)0.72 Total impact

  • Lingzhi Fu · Xiang Shen · Linghao Zhu · Junyu Wang
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    ABSTRACT: In this paper, the design of a low-cost ultra-high-frequency (UHF) Radio Frequency IDentification (RFID) tag chip with an advanced encryption standard (AES) cryptographic engine is presented. The design of digital baseband is verified on a Field-Programmable Gate Array (FPGA) platform. The whole chip, including a radio frequency frontend, an analog frontend, an Electrically Erasable Programmable Read-Only Memory (EEPROM), and a baseband with AES engine, is taped out on Semiconductor Manufacturing International Corporation (SMIC) 0.13μm process. The chip area is 1 × 1 mm2, in which 0.6 × 0.3 mm2 is covered by the digital baseband. The power consumption of the entire tag chip is 20.9 μW. The design can work on both two modes of the standard ISO 18000-6C mode and the security enhanced ISO 18000-6C mode. To the best of our knowledge, it is the first UHF passive RFID tag chip with AES algorithm in the baseband.
    No preview · Article · Feb 2014 · Security and Communication Networks
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    Xiang Shen · Dan Liu · Yuqing Yang · Junyu Wang
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    ABSTRACT: This paper presents a practical implementation of a digital baseband for a low-cost UHF Radio Frequency Identification (RFID) tag, in which a cryptography engine based on International Data Encryption Algorithm (IDEA) primitive is embedded. A mutual authentication scheme enforced by the IDEA engine is proposed. The scheme can improve the security of the ISO 18000-6C protocol and meet the timing constraints of the protocol as well. The whole security-enhanced tag, including digital baseband, RF/analog frontend and memory, has been taped out using SMIC 0.18μm CMOS process. The overall power consumption of the baseband system is 8.96μW when the supply voltage is 1.2V and the clock frequency is 1.28MHz. The tag works at the back linked frequency (BLF) of 80 KHz.
    Full-text · Conference Paper · Jan 2011
  • Mengqin Xiao · Xiang Shen · Junyu Wang · Joseph Crop
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    ABSTRACT: Radio frequency identification (RFID) is a technology for automatic object identification. It has wide applications in many areas such as manufacturing, transportation, healthcare, and so on. However, many RFID systems are suffering from security issues. In this paper, we present an implementation of a secure UHF RFID tag baseband with a Hummingbird (HB) cryptographic engine using the SMIC 0.13µm technology. An improvement of the Gen2 protocol based on our secure engine is proposed to enhance security. The implementation results show that the area of our baseband is 16,986 gate equivalents and the secure engine takes 23.6% of the entire die area. The overall power consumption of our baseband is 30.67µW at a clock frequency of 1.28MHz and with 1.2V power supply, which is suitable for resource-constrained RFID tags.
    No preview · Article · Jan 2011
  • Meng-Qin Xiao · Xiang Shen · Yu-Qing Yang · Jun-Yu Wang
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    ABSTRACT: Hummingbird algorithm is a newly proposed lightweight cryptographic algorithm targeted for low-cost RFID tag. In this paper, we present a hardware implementation of this algorithm using SMIC0.13 μm CMOS process. Methods are used to reduce the unnecessary clock toggling and data toggling to reduce dynamic power. Simulation results show that the total area of our design is 14,735 μm2. It requires 16 clock cycles to encrypt 16-bit data (an additional 69 clock cycles for initialization is needed), and consumes 1.08 μw power for 1.2 V power supply at 100 KHz.
    No preview · Article · Nov 2010