{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,8,17]],"date-time":"2024-08-17T00:22:42Z","timestamp":1723854162276},"reference-count":38,"publisher":"Sociedade Brasileira de Computacao - SB","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JISA"],"abstract":"In the context of the COVID-19 pandemic, using contact-tracking apps and measures such as social isolation and mask-wearing has emerged as an efficient strategy to mitigate the spread of the virus. Nonetheless, these apps have raised privacy concerns. This paper introduces a technique for enhancing Privacy in contact-tracing systems while preserving the data for research purposes. The contact-tracing system employs a unique identifier signed with a key associated with the application and the user. In this system, mobile devices serve as sensors sending beacons, actively detecting nearby devices, and transmitting the identifiers of surrounding contacts to a cloud-based platform. When a user reports a positive COVID-19 diagnosis, a dedicated web service identifies and tracks the identifiers associated with at-risk contacts. The system uses a topic-based publish-subscribe broker, and each identifier represents an individual topic to abstract contact communication and disseminate alert messages. To assess the system's efficacy, we conducted a use case with twenty volunteers using the mobile application for two weeks, representing a small university campus. The quantitative results of the use case demonstrated the system's capability of analyzing potential virus transmission and observing user's social interactions while maintaining their anonymity.<\/jats:p>","DOI":"10.5753\/jisa.2024.3781","type":"journal-article","created":{"date-parts":[[2024,8,16]],"date-time":"2024-08-16T17:17:44Z","timestamp":1723828664000},"source":"Crossref","is-referenced-by-count":0,"title":["Privacy-Preserving Contact Tracing System based on a Publish-Subscribe Model"],"prefix":"10.5753","volume":"15","author":[{"ORCID":"http:\/\/orcid.org\/0009-0005-1009-3014","authenticated-orcid":false,"given":"Mikaella F.","family":"Da Silva","sequence":"first","affiliation":[]},{"ORCID":"http:\/\/orcid.org\/0000-0003-4501-2323","authenticated-orcid":false,"given":"Bruno P.","family":"Santos","sequence":"additional","affiliation":[]},{"ORCID":"http:\/\/orcid.org\/0000-0002-5491-7274","authenticated-orcid":false,"given":"Paulo H. L.","family":"Rettore","sequence":"additional","affiliation":[]},{"ORCID":"http:\/\/orcid.org\/0000-0002-8341-8183","authenticated-orcid":false,"given":"Vin\u00edcius F. S.","family":"Mota","sequence":"additional","affiliation":[]}],"member":"3742","published-online":{"date-parts":[[2024,8,11]]},"reference":[{"key":"1","doi-asserted-by":"crossref","unstructured":"Ahmed, N., Michelin, R. A., Xue, W., Ruj, S., Malaney, R., Kanhere, S. S., Seneviratne, A., Hu, W., Janicke, H., and Jha, S. K. (2020). A survey of covid-19 contact tracing apps. IEEE access<\/i>, 8:134577-134601. DOI: 10.1109\/ACCESS.2020.3010226<\/a>.","DOI":"10.1109\/ACCESS.2020.3010226"},{"key":"2","doi-asserted-by":"crossref","unstructured":"Ali, Y. and Khan, H. U. (2023). A survey on harnessing the applications of mobile computing in healthcare during the covid-19 pandemic: Challenges and solutions. Computer Networks<\/i>, 224:109605. 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P., O'Sullivan, D. J., and Kivel\u00e4, M. (2024). Effectiveness of contact tracing on networks with cliques. Physical Review E<\/i>, 109(2):024303. DOI: 10.48550\/arXiv.2304.10405<\/a>.","DOI":"10.1103\/PhysRevE.109.024303"},{"key":"31","doi-asserted-by":"crossref","unstructured":"Smith, P., Sarkar, S., Patwari, N., and Kasera, S. (2024). On Passive Privacy-Preserving Exposure Notification Using Hash Collisions. IEEE Internet of Things Journal<\/i>. DOI: 10.1109\/JIOT.2024.3353255<\/a>.","DOI":"10.1109\/JIOT.2024.3353255"},{"key":"32","doi-asserted-by":"crossref","unstructured":"Stevens, H. and Haines, M. B. (2020). Tracetogether: pandemic response, democracy, and technology. East Asian Science, Technology and Society: An International Journal<\/i>, 14(3):523-532. DOI: 10.1215\/18752160-8698301<\/a>.","DOI":"10.1215\/18752160-8698301"},{"key":"33","unstructured":"Stutzman, F. and Hartzog, W. (2012). Obscurity by design: An approach to building privacy into social media. 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Available online [link<\/a>] Last access 27\/03\/2023."}],"container-title":["Journal of Internet Services and Applications"],"original-title":[],"link":[{"URL":"https:\/\/journals-sol.sbc.org.br\/index.php\/jisa\/article\/download\/3781\/2851","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals-sol.sbc.org.br\/index.php\/jisa\/article\/download\/3781\/2851","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,8,16]],"date-time":"2024-08-16T17:17:57Z","timestamp":1723828677000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals-sol.sbc.org.br\/index.php\/jisa\/article\/view\/3781"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,8,11]]},"references-count":38,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2024,3,4]]}},"URL":"https:\/\/doi.org\/10.5753\/jisa.2024.3781","relation":{},"ISSN":["1869-0238"],"issn-type":[{"value":"1869-0238","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,8,11]]}}}