Abstract
The eruption of a pandemic, such as COVID-19, can cause an unprecedented global crisis. Contact tracing, as a pillar of communicable disease control in public health for decades, has shown its effectiveness on pandemic control. Despite intensive research on contact tracing, existing schemes are vulnerable to attacks and can hardly simultaneously meet the requirements of data integrity and user privacy. The design of a privacy-preserving contact tracing framework to ensure the integrity of the tracing procedure has not been sufficiently studied and remains a challenge. In this paper, we propose P2B-Trace, a privacy-preserving contact tracing initiative based on blockchain. First, we design a decentralized architecture with blockchain to record an authenticated data structure of the user's contact records, which prevents the user from intentionally modifying his local records afterward. Second, we develop a zero-knowledge proximity verification scheme to further verify the user's proximity claim while protecting user privacy. We implement P2B-Trace and conduct experiments to evaluate the cost of privacy-preserving tracing integrity verification. The evaluation results demonstrate the effectiveness of our proposed system.
Original language | English |
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Title of host publication | SIGMOD '21: Proceedings of the 2021 International Conference on Management of Data |
Publisher | Association for Computing Machinery (ACM) |
Pages | 2389-2393 |
Number of pages | 5 |
ISBN (Print) | 9781450383431 |
DOIs | |
Publication status | Published - Jun 2021 |
Event | ACM SIGMOD International Conference on Management of Data, SIGMOD 2021 - Virtual, Online, China Duration: 20 Jun 2021 → 25 Jun 2021 https://dl.acm.org/doi/proceedings/10.1145/3448016 |
Publication series
Name | Proceedings of the ACM SIGMOD International Conference on Management of Data |
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ISSN (Print) | 0730-8078 |
Conference
Conference | ACM SIGMOD International Conference on Management of Data, SIGMOD 2021 |
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Country/Territory | China |
Period | 20/06/21 → 25/06/21 |
Internet address |
Scopus Subject Areas
- Software
- Information Systems
User-Defined Keywords
- blockchain
- contact tracing
- integrity
- privacy-preserving