Abstract
Traditional testator-written wills can easily be lost, easily be tampered with, and forged when kept by the testator himself. The appearance of electronic wills provides convenience for will retention. However, centralized storage has risks such as malicious attacks and single point of failure. Due to the advantages of decentralization, immutable and traceable, applications based on blockchain can realize the sharing of will data but faces the problem of privacy leakage in the sharing. In this paper, we propose a weighted attribute-based encryption scheme to achieve access control of will data in blockchain while reducing the complexity of access policy. The Traceable Radix Tree index structure is designed to improve the query efficiency of users while supporting the quick query of wills’ historical versions in reverse chronological order to ensure the legal validity of wills. The supervision chain, which is regulated through supervision institutions, is introduced to store the query records of users on the blockchain and prevent the privacy disclosure of users during the query process. Finally, the effectiveness of the proposed scheme is proved by relevant experiments.
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Acknowledgement
This work is supported by the Major projects of National Social Science Foundation of China (No. 21&ZD124): research on the community home-based elderly care model and quality safety system based on blockchain. We also thank anonymous reviewers for the helpful reports.
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Yang, C., Dong, X., Zhang, N., Wen, Z. (2023). Will Data Sharing Scheme Based on Blockchain and Weighted Attribute-Based Encryption. In: Yuan, L., Yang, S., Li, R., Kanoulas, E., Zhao, X. (eds) Web Information Systems and Applications. WISA 2023. Lecture Notes in Computer Science, vol 14094. Springer, Singapore. https://doi.org/10.1007/978-981-99-6222-8_33
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DOI: https://doi.org/10.1007/978-981-99-6222-8_33
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