Secure and Fast Near-Field Acoustic Communication Using Acoustic and Vibrational Signals

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Author(s)

    • NISHIHARA Saki
    • Graduate School of Systems and Information Engineering, University of Tsukuba
    • EBIHARA Tadashi
    • Faculty of Engineering, Information and Systems, University of Tsukuba
    • MIZUTANI Koichi
    • Faculty of Engineering, Information and Systems, University of Tsukuba
    • WAKATSUKI Naoto
    • Faculty of Engineering, Information and Systems, University of Tsukuba

Abstract

<p>In this paper, we propose a secure near-field communication (NFC) for smartphones by combining acoustic and vibrational communication. In our hybrid system, a transmitter transmits an encrypted message and encryption key from a loudspeaker and vibration motor, respectively. While the sound emitted from the loudspeaker propagates through the air, the vibration emitted by the vibration motor propagates through the body of smartphones. Hence, only receivers touching the transmitter can receive both the encrypted message and the key, resulting in secure communication. We designed a software modulator and demodulator suitable for the vibrational communication by using return-to-zero (RZ) code. Then we established a hybrid communication system by combining acoustic and vibrational communication modems, and evaluated its performance in experiments. The results indicate that our hybrid system achieved a secure (among physically contacted devices) and fast (800kbps) NFC for smartphones.</p>

Journal

  • IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

    IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E101.A(11), 1841-1848, 2018

    The Institute of Electronics, Information and Communication Engineers

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