A threat for tablet PCs in public space: Remote visualization of screen images using em emanation

Yu-Ichi Hayashi, Naofumi Homma, Mamoru Miura, Takafumi Aoki, Hideaki Sone

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

39 Citations (Scopus)

Abstract

The use of tablet PCs is spreading rapidly, and accordingly users browsing and inputting personal information in public spaces can often be seen by third parties. Unlike conventional mobile phones and notebook PCs equipped with distinct input devices (e.g., keyboards), tablet PCs have touchscreen keyboards for data input. Such integration of display and input device increases the potential for harm when the display is captured by malicious attackers. This paper presents the description of reconstructing tablet PC displays via measurement of electromagnetic (EM) emanation. In conventional studies, such EM display capture has been achieved by using non-portable setups. Those studies also assumed that a large amount of time was available in advance of capture to obtain the electrical parameters of the target display. In contrast, this paper demonstrates that such EM display capture is feasible in real time by a setup that fits in an attaché case. The screen image reconstruction is achieved by performing a prior course profiling and a complemental signal processing instead of the conventional fine parameter tuning. Such complemental processing can eliminate the differences of leakage parameters among individuals and therefore correct the distortions of images. The attack distance, 2 m, makes this method a practical threat to general tablet PCs in public places. This paper discusses possible attack scenarios based on the setup described above. In addition, we describe a mechanism of EM emanation from tablet PCs and a countermeasure against such EM display capture.

Original languageEnglish
Title of host publicationProceedings of the ACM Conference on Computer and Communications Security
PublisherAssociation for Computing Machinery
Pages954-965
Number of pages12
ISBN (Electronic)9781450329576, 9781450329576, 9781450331470, 9781450331500, 9781450331517, 9781450331524, 9781450331531, 9781450331548, 9781450331555, 9781450332392
ISBN (Print)9781450329576, 9781450329576, 9781450331470, 9781450331500, 9781450331517, 9781450331524, 9781450331531, 9781450331548, 9781450331555, 9781450332392
DOIs
Publication statusPublished - 2014 Nov 3
Event21st ACM Conference on Computer and Communications Security, CCS 2014 - Scottsdale, United States
Duration: 2014 Nov 32014 Nov 7

Publication series

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

Other

Other21st ACM Conference on Computer and Communications Security, CCS 2014
Country/TerritoryUnited States
CityScottsdale
Period14/11/314/11/7

Keywords

  • EM information leakage
  • Remote screen-image visualization
  • Tablet PCs
  • Touch-screen devices

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications

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