Abstract
Development of the Internet leads to a growing number of data. The data collected across the city is very useful for analysis and decision making. Data sharing is an important way to make good use of the valuable data. Since the data cannot be disclosed publicly in some cases, encrypted data sharing schemes are proposed. However, encryption causes a certain difficulty in data usage. In order to balance the data usage and privacy, this paper proposes a privacy-preserving blockchain-based data sharing scheme for smart cities, in which data is only shared to the authorized user. Moreover, the data accountability, trust and non-repudiability are provided by using blockchain, the access control and data confidentiality are enabled by using Attribute-Based Encryption (ABE), the Interplanetary File System (IPFS) system is used to mitigate the limitation of blockchain storage. Furthermore, the proposed scheme provides retrieval privacy to users, the interest record is obfuscated with other unrelated records to protect the user’s privacy. The theoretical analysis and simulation are performed, and the results show that the proposed scheme is feasible.
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Acknowledgment
This work was partly supported by Natural Science Foundation (U19A2066), Project of Chengdu Science and Technology (2019-YF09-00048-CG).
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Wang, Y., Wang, X., Wen, P., Hu, T., Zhang, X. (2020). A Privacy-Preserving Blockchain-based Information Shared Scheme in Smart-Cities. In: Chellappan, S., Choo, KK.R., Phan, N. (eds) Computational Data and Social Networks. CSoNet 2020. Lecture Notes in Computer Science(), vol 12575. Springer, Cham. https://doi.org/10.1007/978-3-030-66046-8_23
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DOI: https://doi.org/10.1007/978-3-030-66046-8_23
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