Abstract
The cloud storage and sharing system are widely used in medical systems. The unique characteristics of cloud storage enable healthy data being efficiently delivered and retrieved. Nevertheless, traditional medical cloud system suffers two flaws. For one thing, centralized cloud servers are vulnerable to malicious attack and single point of failure. For another, these systems cannot offer a powerful capability to protect medical health data. Blockchain technology is considered to be one of vital technologies of Bitcoin. In this paper, we propose a security model which combines the cloud storage technology with blockchain technology. Our model adopts Delegate Proof of Stake (DPOS) consensus mechanism to ensure that all nodes have unified state in the network. Additionally, the CP-ABE scheme is introduced into the Proxy Re-encryption to store and share medical data which supports the keywords searching. Moreover, we rank medical institutions that different ranks have different duties. In our secure sharing models, there are no central nodes and it is a distributed environment. It not only can reduce the access overhead of the blockchain but also better resist the collusion attack. Furthermore, our security analysis indicates that the proposed scheme achieves provable security under the q-DBDHE assumption in the random oracle model. Then, the comparisons show that our model is more efficient and practical than previous ones.
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© 2019 ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
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Feng, T., Jiao, Y., Fang, J. (2019). Secure Sharing Model Based on Block Chain in Medical Cloud (Short Paper). In: Wang, X., Gao, H., Iqbal, M., Min, G. (eds) Collaborative Computing: Networking, Applications and Worksharing. CollaborateCom 2019. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 292. Springer, Cham. https://doi.org/10.1007/978-3-030-30146-0_30
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DOI: https://doi.org/10.1007/978-3-030-30146-0_30
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