| Presentation | 2022-07-14 A Study of Dynamic Privacy Control Method in LDP for Preserving Temporal/Spatial Intrinsic Information Value of Trajectory Data Taisho Sasada, Yuzo Taenaka, Youki Kadobayashi, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Spatiotemporal data, including people's movement trajectories and transit points, is highly valuable for various applications, such as analyzing people's behavior in physical space and urban design. In response to this problem, data collection using Local Differential Privacy (LDP), in which privacy-protected processing is applied to one's own trajectory data at each individual's terminal before sending it to a data store, has attracted attention. However, data collected using this method cannot retain the spatial and temporal characteristics of the data before privacy-protection processing. This is because the terminal applies noise to make the entire data indistinguishable based on the specified privacy protection strength (privacy budget), making the temporal and spatial characteristics difficult to distinguish at the same time. Therefore, we propose a method of privacy protection that preserves spatial and temporal characteristics after LDP is applied. Instead of a uniform privacy budget, the proposed method aligns the privacy budget for each terminal cluster that follows a similar trajectory. This makes the data within a cluster indistinguishable, while preserving the spatial and temporal information of the trajectory and path traversed by the cluster. Experimental results show that the proposed method maintains a certain level of data availability while preserving the privacy protection of the trajectory data providers. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Local Differential Privacy / Trajectory Data / Private Spatial Decomposition / Data Collection |
| Paper # | NS2022-47 |
| Date of Issue | 2022-07-06 (NS) |
| Conference Information | |
| Committee | NS / SR / RCS / SeMI / RCC |
|---|---|
| Conference Date | 2022/7/13(3days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | The Kanazawa Theatre + Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Distributed Wireless Network, M2M (Machine-to-Machine)，D2D (Device-to-Device)，IoT（Internet of Things）, etc |
| Chair | Tetsuya Oishi(NTT) / Suguru Kameda(Hiroshima Univ.) / Kenichi Higuchi(Tokyo Univ. of Science) / Koji Yamamoto(Kyoto Univ.) / Shunichi Azuma(Nagoya Univ.) |
| Vice Chair | Takumi Miyoshi(Shibaura Insti of Tech.) / Osamu Takyu(Shinshu Univ.) / Kentaro Ishidu(NICT) / Kazuto Yano(ATR) / Tomoya Tandai(Toshiba) / Fumihide Kojima(NICT) / Osamu Muta(Kyushu Univ.) / Kazuya Monden(Hitachi) / Yasunori Owada(NICT) / Shunsuke Saruwatari(Osaka Univ.) / Shunichi Azuma(Hokkaido Univ.) / Koji Ishii(Kagawa Univ.) |
| Secretary | Takumi Miyoshi(NTT) / Osamu Takyu(Kogakuin Univ.) / Kentaro Ishidu(Mie Univ.) / Kazuto Yano(Tokai Univ.) / Tomoya Tandai(NTT) / Fumihide Kojima(Panasonic) / Osamu Muta(Univ. of Electro-Comm) / Kazuya Monden(Sharp) / Yasunori Owada(NTT DOCOMO) / Shunsuke Saruwatari(Tokyo Univ. of Agri. and Tech.) / Shunichi Azuma(Osaka Univ.) / Koji Ishii(CRIEPI) |
| Assistant | Kotaro Mihara(NTT) / Taichi Ohtsuji(NEC) / WANG Xiaoyan(Ibaraki Univ.) / Akemi Tanaka(MathWorks) / Katsuya Suto(Univ. of Electro-Comm) / Manabu Sakai(Mitsubishi Electric) / Masashi Iwabuchi(NTT) / Tatsuki Okuyama(NTT DOCOMO) / Issei Kanno(KDDI Research) / Yuyuan Chang(Tokyo Inst. of Tech) / Yuki Matsuda(NAIST) / Akihito Taya(Aoyama Gakuin Univ.) / Takeshi Hirai(Osaka Univ.) / SHAN LIN(NICT) / Ryosuke Adachi(Yamaguchi Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Network Systems / Technical Committee on Smart Radio / Technical Committee on Radio Communication Systems / Technical Committee on Sensor Network and Mobile Intelligence / Technical Committee on Reliable Communication and Control |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study of Dynamic Privacy Control Method in LDP for Preserving Temporal/Spatial Intrinsic Information Value of Trajectory Data |
| Sub Title (in English) | |
| Keyword(1) | Local Differential Privacy |
| Keyword(2) | Trajectory Data |
| Keyword(3) | Private Spatial Decomposition |
| Keyword(4) | Data Collection |
| 1st Author's Name | Taisho Sasada |
| 1st Author's Affiliation | Nara Institute of Science and Technology(NAIST) |
| 2nd Author's Name | Yuzo Taenaka |
| 2nd Author's Affiliation | Nara Institute of Science and Technology(NAIST) |
| 3rd Author's Name | Youki Kadobayashi |
| 3rd Author's Affiliation | Nara Institute of Science and Technology(NAIST) |
| Date | 2022-07-14 |
| Paper # | NS2022-47 |
| Volume (vol) | vol.122 |
| Number (no) | NS-105 |
| Page | pp.pp.106-111(NS), |
| #Pages | 6 |
| Date of Issue | 2022-07-06 (NS) |