Obfuscating spatial point tracks with simulated crowding
| Autor: | Scheider, S., Wang, J., Mol, Maarten, Schmitz, O., Karssenberg, D.J., Social Urban Transitions, Landdegradatie en aardobservatie, Landscape functioning, Geocomputation and Hydrology, Hydrologie |
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| Přispěvatelé: | Social Urban Transitions, Landdegradatie en aardobservatie, Landscape functioning, Geocomputation and Hydrology, Hydrologie, Department of Urban and Regional Planning and Geo-Information Management, UT-I-ITC-PLUS, Faculty of Geo-Information Science and Earth Observation |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
point quality preservation
exposure assessment Computer science Geography Planning and Development Library and Information Sciences computer.software_genre Crowding obfuscation Obfuscation (software) ITC-HYBRID ITC-ISI-JOURNAL-ARTICLE Point (geometry) Data mining computer Geoprivacy Information Systems |
| Zdroj: | International Journal of Geographical Information Science, 34(7), 1398. Taylor and Francis Ltd. International journal of geographical information science, 34(7), 1398-1427. Taylor & Francis |
| ISSN: | 1365-8816 |
| Popis: | Spatial point tracks are of concern for an increasing number of analysts studying spatial behaviour patterns and environmental effects. Take an epidemiologist studying the behaviour of cyclists and how their health is affected by the city’s air quality. The accuracy of such analyses critically depends on the positional accuracy of the tracked points. This poses a serious privacy risk. Tracks easily reveal a person’s identity since the places visited function as fingerprints. Current obfuscation-based privacy protection methods, however, mostly rely on point quality reduction, such as spatial cloaking, grid masking or random noise, and thus render an obfuscated track less useful for exposure assessment. We introduce simulated crowding as a point quality preserving obfuscation principle that is based on adding fake points. We suggest two crowding strategies based on extending and masking a track to defend against inference attacks. We test them across various attack strategies and compare them to state-of-the-art obfuscation techniques both in terms of information loss and attack resilience. Results indicate that simulated crowding provides high resilience against home attacks under constantly low information loss. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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