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Capacitive fingerprinting: exploring user differentiation by sensing electrical properties of the human body

Published: 07 October 2012 Publication History

Abstract

At present, touchscreens can differentiate multiple points of contact, but not who is touching the device. In this work, we consider how the electrical properties of humans and their attire can be used to support user differentiation on touchscreens. We propose a novel sensing approach based on Swept Frequency Capacitive Sensing, which measures the impedance of a user to the environment (i.e., ground) across a range of AC frequencies. Different people have different bone densities and muscle mass, wear different footwear, and so on. This, in turn, yields different impedance profiles, which allows for touch events, including multitouch gestures, to be attributed to a particular user. This has many interesting implications for interactive design. We describe and evaluate our sensing approach, demonstrating that the technique has considerable promise. We also discuss limitations, how these might be overcome, and next steps.

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Cited By

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  • (2024)Body-Area Capacitive or Electric Field Sensing for Human Activity Recognition and Human-Computer InteractionProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36435558:1(1-49)Online publication date: 6-Mar-2024
  • (2024)CT-Auth: Capacitive Touchscreen-Based Continuous Authentication on SmartphonesIEEE Transactions on Knowledge and Data Engineering10.1109/TKDE.2023.327787936:1(90-106)Online publication date: Jan-2024
  • (2023)Z-Ring: Single-Point Bio-Impedance Sensing for Gesture, Touch, Object and User RecognitionProceedings of the 2023 CHI Conference on Human Factors in Computing Systems10.1145/3544548.3581422(1-18)Online publication date: 19-Apr-2023
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    cover image ACM Conferences
    UIST '12: Proceedings of the 25th annual ACM symposium on User interface software and technology
    October 2012
    608 pages
    ISBN:9781450315807
    DOI:10.1145/2380116
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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    Published: 07 October 2012

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    Author Tags

    1. collaborative multi-user interaction
    2. finger input
    3. gestures
    4. id
    5. login
    6. sfcs
    7. swept frequency capacitive sensing
    8. touch?
    9. touchscreens
    10. user identification

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    Cited By

    View all
    • (2024)Body-Area Capacitive or Electric Field Sensing for Human Activity Recognition and Human-Computer InteractionProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36435558:1(1-49)Online publication date: 6-Mar-2024
    • (2024)CT-Auth: Capacitive Touchscreen-Based Continuous Authentication on SmartphonesIEEE Transactions on Knowledge and Data Engineering10.1109/TKDE.2023.327787936:1(90-106)Online publication date: Jan-2024
    • (2023)Z-Ring: Single-Point Bio-Impedance Sensing for Gesture, Touch, Object and User RecognitionProceedings of the 2023 CHI Conference on Human Factors in Computing Systems10.1145/3544548.3581422(1-18)Online publication date: 19-Apr-2023
    • (2021)Oh, Snap! A Fabrication Pipeline to Magnetically Connect Conventional and 3D-Printed ElectronicsProceedings of the 2021 CHI Conference on Human Factors in Computing Systems10.1145/3411764.3445641(1-11)Online publication date: 6-May-2021
    • (2021)eGlove: Designing Interactive Fabric Sensor for Enhancing Contact-Based InteractionsExtended Abstracts of the 2021 CHI Conference on Human Factors in Computing Systems10.1145/3411763.3451824(1-7)Online publication date: 8-May-2021
    • (2020)BodyWire-HCIACM Transactions on Computer-Human Interaction10.1145/340623827:6(1-25)Online publication date: 8-Nov-2020
    • (2020)CapacitivoProceedings of the 33rd Annual ACM Symposium on User Interface Software and Technology10.1145/3379337.3415829(649-661)Online publication date: 20-Oct-2020
    • (2020)ThreadSense: Locating Touch on an Extremely Thin Interactive ThreadProceedings of the 2020 CHI Conference on Human Factors in Computing Systems10.1145/3313831.3376779(1-12)Online publication date: 21-Apr-2020
    • (2018)[Papers] Integrated Transparent NFC Antennas on Touch DisplaysITE Transactions on Media Technology and Applications10.3169/mta.6.2806:4(280-285)Online publication date: 2018
    • (2018)FDSenseProceedings of the 31st Annual ACM Symposium on User Interface Software and Technology10.1145/3242587.3242644(809-823)Online publication date: 11-Oct-2018
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