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    题名: Cryptanalysis and Improvement to Two Key-Policy Attribute-Based Encryption Schemes for Weighted Threshold Gates
    作者: 曾一凡
    Tseng, Yi-Fan;Chen, Pin-Hao
    贡献者: 資訊系
    关键词: attribute-based encryption;weighted threshold gates;cryptanalysis;access control;collusion attack
    日期: 2023-07
    上传时间: 2024-02-16 15:37:01 (UTC+8)
    摘要: 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.
    關聯: 13th International Conference on Frontier Computing, IET Taipei Local Network
    数据类型: conference
    DOI 連結: https://doi.org/10.1007/978-981-99-9342-0_15
    DOI: 10.1007/978-981-99-9342-0_15
    显示于类别:[資訊科學系] 會議論文

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