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• W4313391751 endingPage "566" @default.
• W4313391751 startingPage "566" @default.
• W4313391751 abstract "Although there are several access control systems in the literature for flexible policy management in multi-authority and multi-domain environments, achieving interoperability and scalability, without relying on strong trust assumptions, is still an open challenge. We present HMBAC, a distributed fine-grained access control model for shared and dynamic multi-authority and multi-domain environments, along with Janus, a practical system for HMBAC policy enforcement. The proposed HMBAC model supports: (a) dynamic trust management between different authorities; (b) flexible access control policy enforcement, defined at the domain and cross-domain level; (c) a global source of truth for all entities, supported by an immutable, audit-friendly mechanism. Janus implements the HMBAC model and relies on the effective fusion of two core components. First, a Hierarchical Multi-Blockchain architecture that acts as a single access point that cannot be bypassed by users or authorities. Second, a Multi-Authority Attribute-Based Encryption protocol that supports flexible shared multi-owner encryption, where attribute keys from different authorities are combined to decrypt data distributedly stored in different authorities. Our approach was implemented using Hyperledger Fabric as the underlying blockchain, with the system components placed in Kubernetes Docker container pods. We experimentally validated the effectiveness and efficiency of Janus, while fully reproducible artifacts of both our implementation and our measurements are provided." @default.
• W4313391751 created "2023-01-06" @default.
• W4313391751 creator A5053202585 @default.
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• W4313391751 date "2022-12-31" @default.
• W4313391751 modified "2023-09-29" @default.
• W4313391751 title "Janus: Hierarchical Multi-Blockchain-Based Access Control (HMBAC) for Multi-Authority and Multi-Domain Environments" @default.
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• W4313391751 doi "https://doi.org/10.3390/app13010566" @default.
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