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Protect your Data and I'll Show Its Utility: A Practical View about Mix-zones Impacts on Mobility Data for Smart City Applications

Published: 30 October 2023 Publication History

Abstract

When designing smart cities' building blocks, mobility data plays a fundamental role in applications and services. However, mobility data usually comes with unrestricted location of its corresponding entities (e.g., citizens and vehicles) and poses privacy concerns, among them recovering the identity of those entities with linking attacks. To address the privacy of users' identity, Location Privacy Protection Mechanisms (LPPMs) based on anonymization have been proposed, such as mix-zones. Once the data is protected, a comprehensive discussion about the trade-off between privacy and utility happens. However, issues still arise about the application of anonymized data to smart city development: what are the smart cities applications and services that can best leverage mobility data anonymized by mix-zones? To answer this question, we present a methodology that evaluates the utility in many aspects with metrics related to privacy, mobility, and anonymized trajectories produced by mix-zones. The results showed that the proposed methodology identifies application domains of smart cities in which anonymized data can have more or less utility. Additionally, different datasets present different behaviors in terms of utility. These insights can contribute significantly to the utility of both open and private data markets for smart cities.

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  1. Protect your Data and I'll Show Its Utility: A Practical View about Mix-zones Impacts on Mobility Data for Smart City Applications

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    cover image ACM Conferences
    PE-WASUN '23: Proceedings of the Int'l ACM Symposium on Performance Evaluation of Wireless Ad Hoc, Sensor, & Ubiquitous Networks
    October 2023
    129 pages
    ISBN:9798400703706
    DOI:10.1145/3616394
    Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than the author(s) must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected].

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    Published: 30 October 2023

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    Author Tags

    1. location privacy
    2. mix-zones
    3. mobility characterization metrics
    4. open data
    5. smart cities
    6. utility anonymized data

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    • Fundac?a?o de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG)
    • Conselho Nacional de Desenvolvimento Cienti?fico e Tecnolo?gico (CNPq)
    • Sa?o Paulo Research Foundation (FAPESP)
    • Coordenac?a?o de Aperfeic?oamento de Pessoal de Ni?vel Superior, Brasil (CAPES)

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