Reliable access under dual provenance for public storage cloud
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Date
2023
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Publisher
NHCE
Abstract
In public cloud storage systems, data access control is a difficult problem to solve. A promising method known as Ciphertext-Policy Attribute-Based Encryption (CP-ABE) has been developed to offer flexible, fine-grained, and secure data access control for cloud storage with honest but sceptic cloud servers. A CP-ABE method is used in a large-scale cloud storage system, however because the sole attribute authority in existing CP-ABE schemes is required to carry out the cumbersome user legitimacy verification and secret key distribution, this results in a single-point performance bottleneck. Users might spend a lengthy time waiting in queue to get their secret keys, which would reduce the system's efficiency. Despite the fact that multiauthority access control systems have been put forth, they are still limited by the single-point bottleneck and their low efficiency since each authority still handles a disjoint attribute set individually. In this research, we provide a brand-new heterogeneous framework to solve the single-point performance bottleneck issue and to offer a more effective access control system with an auditing mechanism. To distribute the workload of user authenticity verification, our architecture makes use of various attribute authorities. In the meanwhile, a CA (Central Authority) is added to our system to create secret keys for users whose validity has been established. In contrast to existing multiauthority access control techniques, our scheme gives each authority unique control over the whole collection of attributes. In order to increase security, we also provide a technique for identifying which AAs (Attribute Authorities) carried out the validity verification process deceptively or wrongly. Analysis reveals that our solution significantly improves key generation performance while simultaneously guaranteeing the security requirements.