| Presentation | 2021-03-01 On the Privacy Risk of Exposure Notification Framework: Assessment and Countermeasures Kazuki Nomoto, Mitsuaki Akiyama, Masashi Eto, Atsuo Inomata, Tatsuya Mori, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The Exposure Notification Framework uses the Bluetooth Low Energy (BLE) signal generated by a smartphone to determine close contact with a positive person. It is used in COVID-19 contact tracing applications. This decentralized mechanism exchanges anonymous identifiers. The risk of privacy violation is considered to be low. However, there are still insufficient studies on the risks from the technical aspects of the signal strength and transmission cycle of the radio waves emitted by smartphones. In this study, we focus on the privacy risk of Google/Apple's Exposure Notification, and evaluate the threat by field experiments and simulations, focusing on the privacy risk of identifying the facial image of a positive person by using the BLE signal strength and camera images. We will also propose and evaluate effective countermeasures. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Contact tracing / Exposure Notification / COVID-19 |
| Paper # | ICSS2020-34 |
| Date of Issue | 2021-02-22 (ICSS) |
| Conference Information | |
| Committee | ICSS / IPSJ-SPT |
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| Conference Date | 2021/3/1(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Security, Trust, etc. |
| Chair | Hiroki Takakura(NII) |
| Vice Chair | Katsunari Yoshioka(Yokohama National Univ.) / Kazunori Kamiya(NTT) |
| Secretary | Katsunari Yoshioka(NICT) / Kazunori Kamiya(KDDI labs.) |
| Assistant | Keisuke Kito(Mitsubishi Electric) / Toshihiro Yamauchi(Okayama Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Information and Communication System Security / Special Interest Group on Security Psychology and Trust |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On the Privacy Risk of Exposure Notification Framework: Assessment and Countermeasures |
| Sub Title (in English) | |
| Keyword(1) | Contact tracing |
| Keyword(2) | Exposure Notification |
| Keyword(3) | COVID-19 |
| 1st Author's Name | Kazuki Nomoto |
| 1st Author's Affiliation | Waseda University(Waseda Univ.) |
| 2nd Author's Name | Mitsuaki Akiyama |
| 2nd Author's Affiliation | NTT Secure Platform Laboratories(NTT) |
| 3rd Author's Name | Masashi Eto |
| 3rd Author's Affiliation | National Institute of Information and Communications Technology(NICT) |
| 4th Author's Name | Atsuo Inomata |
| 4th Author's Affiliation | Osaka University(Osaka Univ.) |
| 5th Author's Name | Tatsuya Mori |
| 5th Author's Affiliation | Waseda University/National Institute of Information and Communications Technology(Waseda Univ./NICT) |
| Date | 2021-03-01 |
| Paper # | ICSS2020-34 |
| Volume (vol) | vol.120 |
| Number (no) | ICSS-384 |
| Page | pp.pp.49-54(ICSS), |
| #Pages | 6 |
| Date of Issue | 2021-02-22 (ICSS) |