Cardiac scan: A non-contact and continuous heart-based user authentication system

Feng Lin, Chen Song, Yan Zhuang, Wenyao Xu, Changzhi Li, Kui Ren

Research output: Chapter in Book/Report/Conference proceedingConference contribution

41 Scopus citations

Abstract

Continuous authentication is of great importance to maintain the security level of a system throughout the login session. The goal of this work is to investigate a trustworthy, continuous, and non-contact user authentication approach based on a heart-related bio-metric that works in a daily-life environment. To this end, we present a novel, continuous authentication system, namely Cardiac Scan, based on geometric and non-volitional features of the cardiac motion. Cardiac motion is an automatic heart deformation caused by self-excitement of the cardiac muscle, which is unique to each user and is difficult (if not impossible) to counterfeit. Cardiac Scan features intrinsic liveness detection, unobtrusiveness, cost-effectiveness, and high usability. We prototype a remote, highresolution cardiac motion sensing system based on the smart DC-coupled continuous-wave radar. Fiducial-based invariant identity descriptors of cardiac motion are extracted after the radar signal demodulation. We conduct a pilot study with 78 subjects to evaluate Cardiac Scan in accuracy, authentication time, permanence, evaluation in complex conditions, and vulnerability. Specifically, Cardiac Scan achieves 98.61% balanced accuracy (BAC) and 4.42% equal error rate (EER) in a real-world setup. We demonstrate that Cardiac Scan is a robust and usable continuous authentication system.

Original languageEnglish
Title of host publicationMobiCom 2017 - Proceedings of the 23rd Annual International Conference on Mobile Computing and Networking
PublisherAssociation for Computing Machinery
Pages315-328
Number of pages14
ISBN (Electronic)9781450349161
DOIs
StatePublished - Oct 4 2017
Event23rd Annual International Conference on Mobile Computing and Networking, MobiCom 2017 - Snowbird, United States
Duration: Aug 16 2017Aug 20 2017

Publication series

NameProceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM
VolumePart F131210

Conference

Conference23rd Annual International Conference on Mobile Computing and Networking, MobiCom 2017
CountryUnited States
CitySnowbird
Period08/16/1708/20/17

Keywords

  • Biometrics
  • Continuous authentication
  • Non-contact sensing

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