Abstract
Internet of things is and will revolutionize our society and life tremendously. And data, generated by tons of IoT devices, is the foundation of all that. It is equatable to say that sharing enables data to play its due value and even makes it more valuable. While it is impractical for data owners to share for free, especially in terms of electronic health records (EHR) contain private information. Many data sharing schemes were proposed and very few of them can fulfil efficient sharing and fair payment simultaneously. One vital issue to achieve fair payment is how to verify the effectiveness of participants’ behaviours, such as the integrity of data stored in the third-party server. Furthermore, in most existed data sharing systems, each access is authorized by the data owner, which requires the data owner to be online in real time and leads to too many interactions and high overlheads. In this paper, we design a blockchain-assisted data sharing scheme by combining the attribute-based encryption (ABE) primitive. Our scheme achieves efficient one-to-many data sharing, fine-grained access control, efficient decryption, user-level revocation, fairness payment and reliable data integrity verification.
This work was partially supported by NSF of China under Grants 61832012, 61672321, 61771289 and 61373027, and the Science, Education and Industry Integration Innovation Program of Qilu University of Technology (Shandong Academy of Science) under Grant 2020KJC-ZD02.
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Liu, S., Yu, J., Chen, L. (2021). Rewarding and Efficient Data Sharing in EHR System with Coalition Blockchain Assistance. In: Liu, Z., Wu, F., Das, S.K. (eds) Wireless Algorithms, Systems, and Applications. WASA 2021. Lecture Notes in Computer Science(), vol 12937. Springer, Cham. https://doi.org/10.1007/978-3-030-85928-2_8
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DOI: https://doi.org/10.1007/978-3-030-85928-2_8
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