| Presentation | 2016-03-11 A study on possibility of screen reconstruction by frequency analysis of electromagnetic emanation from mobile devices Go Itami, Yohei Toriumi, Shinji Goto, Kazuhiro Takaya, Yu-ichi Hayashi, Naofumi Homma, Takafumi Aoki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | There is the risk for mobile devices that its screen is monitored by attackers capturing electromagnetic emanation from it. Specifically, it is reported that emanated electromagnetic waves which enable screen reconstruction to have a special frequency component which corresponds to a horizontal synchronization frequency (we call it ‘drawing frequency’). However, the requirement of emanated electromagnetic waves is not found out clearly yet, because emanated electromagnetic waves which have its drawing frequency components can be not always used to its screen reconstruction. In this paper, we focus on frequency characteristics of AM demodulated signals of emanated electromagnetic waves, and analyze their electromagnetic characteristics experimentally. In particular, we consider the difference of frequency characteristics between the wave with drawing frequency components which cannot be used to screen reconstruction and that of which enables screen reconstruction with AM demodulated signals of these waves from the same devices. As a result, it is observed that emanated electromagnetic waves which enable screen reconstruction to have drawing frequency components and its harmonic components. On the other hand, it is observed that those of which cannot be used to screen reconstruction contain significant noise components other than those components. Therefore, we confirmed the difference between the two waves in frequency characteristics of those AM demodulated signals. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | |
| Paper # | EMCJ2015-125 |
| Date of Issue | 2016-03-04 (EMCJ) |
| Conference Information | |
| Committee | EMCJ |
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| Conference Date | 2016/3/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | EMC |
| Chair | Hideaki Sone(Tohoku Univ.) |
| Vice Chair | Osami Wada(Kyoto Univ.) |
| Secretary | Osami Wada(Okayama Univ.) |
| Assistant | Atsuhiro Takahashi(Toyota Central R&D Labs.) / Yoshiki Kayano(Akita Univ.) / Yusaku Katsube(Hitachi) |
| Paper Information | |
| Registration To | Technical Committee on Electromagnetic Compatibility |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A study on possibility of screen reconstruction by frequency analysis of electromagnetic emanation from mobile devices |
| Sub Title (in English) | |
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| 1st Author's Name | Go Itami |
| 1st Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 2nd Author's Name | Yohei Toriumi |
| 2nd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 3rd Author's Name | Shinji Goto |
| 3rd Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 4th Author's Name | Kazuhiro Takaya |
| 4th Author's Affiliation | Nippon Telegraph and Telephone Corporation(NTT) |
| 5th Author's Name | Yu-ichi Hayashi |
| 5th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 6th Author's Name | Naofumi Homma |
| 6th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| 7th Author's Name | Takafumi Aoki |
| 7th Author's Affiliation | Tohoku University(Tohoku Univ.) |
| Date | 2016-03-11 |
| Paper # | EMCJ2015-125 |
| Volume (vol) | vol.115 |
| Number (no) | EMCJ-509 |
| Page | pp.pp.5-9(EMCJ), |
| #Pages | 5 |
| Date of Issue | 2016-03-04 (EMCJ) |