Weighted Attribute-Based Proxy Re-Encryption Scheme with Distributed Multi-Authority Attributes

被引:0
|
作者
Yi, Wenlong [1 ]
Wang, Chuang [1 ]
Kuzmin, Sergey [2 ]
Gerasimov, Igor [2 ]
Cheng, Xiangping [3 ]
机构
[1] Jiangxi Agr Univ, Sch Software, Nanchang 330045, Peoples R China
[2] St Petersburg Electrotech Univ LETI, Fac Comp Sci & Technol, St Petersburg 197022, Russia
[3] Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330096, Peoples R China
关键词
data sharing; access control; blockchain; data security; attribute authority; SECURITY;
D O I
10.3390/s24154939
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Existing attribute-based proxy re-encryption schemes suffer from issues like complex access policies, large ciphertext storage space consumption, and an excessive authority of the authorization center, leading to weak security and controllability of data sharing in cloud storage. This study proposes a Weighted Attribute Authority Multi-Authority Proxy Re-Encryption (WAMA-PRE) scheme that introduces attribute weights to elevate the expression of access policies from binary to multi-valued, simplifying policies and reducing ciphertext storage space. Simultaneously, the multiple attribute authorities and the authorization center construct a joint key, reducing reliance on a single authorization center. The proposed distributed attribute authority network enhances the anti-attack capability of cloud storage. Experimental results show that introducing attribute weights can reduce ciphertext storage space by 50%, proxy re-encryption saves 63% time compared to repeated encryption, and the joint key construction time is only 1% of the benchmark scheme. Security analysis proves that WAMA-PRE achieves CPA security under the decisional q-parallel BDHE assumption in the random oracle model. This study provides an effective solution for secure data sharing in cloud storage.
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收藏
页数:23
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