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An Improved FH-CP-ABE Scheme with Flexible Attribute Management and Efficient User Decryption

摘要


File hierarchy ciphertext-policy attribute-based encryption (FH-CP-ABE) is a promising method to support data sharing with a multilevel hierarchy structure. This paper proposes an improved FH-CP-ABE scheme to support dynamic privilege management and efficient user decryption. The construction introduces a match-control mechanism between decryption keys and ciphertexts. It achieves flexible and arbitrary attribute alteration and privilege management. Additionally, this improvement increases user performance by delegating most of the decryption operations to the cloud. Finally, the instance and analysis show that this improvement is secure and practical for mobile devices in the hybrid cloud.

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