政大機構典藏-National Chengchi University Institutional Repository(NCCUR):Item 140.119/149888

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政大機構典藏 > 資訊學院 > 資訊科學系 > 會議論文 > Item 140.119/149888

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/149888

Title:	Cryptanalysis and Improvement to Two Key-Policy Attribute-Based Encryption Schemes for Weighted Threshold Gates
Authors:	曾一凡 Tseng, Yi-Fan;Chen, Pin-Hao
Contributors:	資訊系
Keywords:	attribute-based encryption;weighted threshold gates;cryptanalysis;access control;collusion attack
Date:	2023-07
Issue Date:	2024-02-16 15:37:01 (UTC+8)
Abstract:	Attribute-based encryption is one of the most suitable access control mechanism for modern data sharing models. To provide better performance, lots of attribute-based encryption schemes are constructed over without pairings. However, these schemes are either with no security proofs or broken. In this manuscript, we give the cryptanalysis of two key-policy attribute-based encryption schemes for weighted threshold gates. We propose two attack methods, the first one is able to generate valid private keys without the master secret keys, and the second one is able to recover the master secret key when an attacker gathers enough number of private keys. Moreover, an improved schemes is given in this manuscript. We also present a security analysis to show that our improved scheme fix the security flaws with only one pairing added.
Relation:	13th International Conference on Frontier Computing, IET Taipei Local Network
Data Type:	conference
DOI 連結:	https://doi.org/10.1007/978-981-99-9342-0_15
DOI:	10.1007/978-981-99-9342-0_15
Appears in Collections:	[資訊科學系] 會議論文

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