A Study on CP-ABE Based Data Sharing System that Provides Signature-based Verifiable Outsourcing

Hwang, Yong-Woon; Lee, Im-Yeong

doi:10.1109/aeis53850.2021.00008

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…Te literature [6][7][8][9][10][11][12][13][14][15][16] contains studies on reducing the computation consumption of encryption and decryption. Owing to the limited computing power of users, the server must undertake some heavy encryption and decryption computing tasks to improve the operation efciency of the scheme.…”

Section: Related Workmentioning

confidence: 99%

“…During decryption, the blinded private key is used for outsourcing decryption, and then the user obtains the plaintext through only one exponential operation. Hwang and Lee [16] proposed a CP-ABE scheme that can provide signature-based verifable outsourcing in the cloud environment. Te data owners embed their signature into the ciphertext.…”

Section: Related Workmentioning

confidence: 99%

“…Scholars have researched the reduction of the computation consumption of encryption and decryption, including [6][7][8][9][10][11][12][13][14][15][16]. Tese works of literature mainly reduce computational overhead by outsourcing encryption or decryption.…”

Section: Introductionmentioning

confidence: 99%

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CP-ABE Optimization via the Flexible Integration of Access Policies Containing Multiple Shared Subpolicies

Wang

Guo

Helil

2023

Security and Communication Networks

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Ciphertext-policy attribute-based encryption (CP-ABE) is a cryptographic scheme that is suitable for cloud storage and can realize secure data sharing. However, in most existing CP-ABE schemes, the encryption computational overhead is proportional to the number of attributes in the access policy. Therefore, reducing the computational overhead of the scheme’s encryption is an important consideration to improve its efficiency. Furthermore, in the scenario where the access control policies corresponding to different data shared by the same data owner have multiple shared subpolicies, there is still further optimizing space for encryption. This study proposes an optimization approach for CP-ABE via the flexible integration of access policies with multiple shared subpolicies. Regarding the root nodes of policies being both the same and different, we provide optimal policy integration methods to reduce the overall encryption computation cost of the data associated with these access policies. Under the premise of preserving the original security of the CP-ABE scheme, this scheme avoids repeated calculation related to the shared subpolicies during encryption, thus improving the scheme’s efficiency. Finally, the correctness and feasibility of the scheme are examined and verified by theoretical analysis and experiments.

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