Abstract
Time bank is a new model intended to supplement traditional pension systems and alleviate social pension pressure. However, the existing time bank system only considers service demands from the elderly as public, ignoring the need for privacy protection. There is low public participation due to the lack of trust among users. To address these issues, we propose a scheme based on blockchain and attribute-based encryption in time bank, enabling fine-grained access control for shared service demands and promoting secure mutual aid service. We design a multi-authority authorization model to avoid the security implications of a central authority. In order to quickly respond to the secure mutual aid service, we design an outsourced decryption mechanism to reduce the computation overhead on the user side, making it more suitable for resource-constrained devices (e.g., cell phones, iPads). In addition, we introduce an anonymization mechanism to protect the identity privacy of users while regulating the circulation of time coins. Finally, the effectiveness of our 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 community home care model and quality safety System based on blockchain. We also thank anonymous reviewers for the helpful reports.
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Zhang, N., Dong, X., Wen, Z., Yang, C. (2023). Secure Mutual Aid Service Scheme Based on Blockchain and Attribute-Based Encryption in Time Bank. 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_34
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DOI: https://doi.org/10.1007/978-981-99-6222-8_34
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