iLock: Immediate and automatic locking of mobile devices against data theft

Tao Li, Yimin Chen, Jingchao Sun, Xiaocong Jin, Yanchao Zhang

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

9 Scopus citations

Abstract

Mobile device losses and thefts are skyrocketing. The sensitive data hosted on a lost/stolen device are fully exposed to the adversary. Although password-based authentication mechanisms are available on mobile devices, many users reportedly do not use them, and a device may be lost/stolen while in the unlocked mode. This paper presents the design and evaluation of iLock, a secure and usable defense against data theft on a lost/stolen mobile device. iLock automatically, quickly, and accurately recognizes the user's physical separation from his/her device by detecting and analyzing the changes in wireless signals. Once significant physical separation is detected, the device is immediately locked to prevent data theft. iLock relies on acoustic signals and requires at least one speaker and one microphone that are available on most COTS (commodity-off-the-shelf) mobile devices. Extensive experiments on Samsung Galaxy S5 show that iLock can lock the device with negligible false positives and negatives.

Original languageEnglish (US)
Title of host publicationCCS 2016 - Proceedings of the 2016 ACM SIGSAC Conference on Computer and Communications Security
PublisherAssociation for Computing Machinery
Pages933-944
Number of pages12
ISBN (Electronic)9781450341394
DOIs
StatePublished - Oct 24 2016
Event23rd ACM Conference on Computer and Communications Security, CCS 2016 - Vienna, Austria
Duration: Oct 24 2016Oct 28 2016

Publication series

NameProceedings of the ACM Conference on Computer and Communications Security
Volume24-28-October-2016
ISSN (Print)1543-7221

Other

Other23rd ACM Conference on Computer and Communications Security, CCS 2016
Country/TerritoryAustria
CityVienna
Period10/24/1610/28/16

Keywords

  • Audio ranging
  • Device locking
  • Fmcw
  • Smartphone security

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications

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