1.四川师范大学计算机科学学院,四川成都 610101
2.电子科技大学网络与数据安全四川省重点实验室,四川成都 610054
3.中国电子科技集团公司第30研究所,四川成都 610041
[ "康 萍 女,1998年3月出生于四川南充,四川师范大学在读研究生.研究方向为信息安全与云计算. E-mail: iskangping@foxmail.com" ]
赵开强 男,1996年1月出生于四川巴中,四川师范大学在读研究生.研究方向为信息安全与云计算. E-mail: 18483621260@163.com
刘 彬 男,1996年10月出生于四川宜宾,四川师范大学在读研究生.研究方向为区块链、联邦学习与信息安全. E-mail: liubin10@foxmail.com
郭 真 女,1997年9月出生于四川成都,四川师范大学在读研究生.研究方向为信息安全与云计算. E-mail: ssbguo@foxmail.com
收稿:2021-04-16,
修回:2022-04-10,
纸质出版:2023-09-25
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康萍,赵开强,刘彬等.支持大属性空间和安全分级的KP-ABE[J].电子学报,2023,51(09):2549-2557.
KANG Ping,ZHAO Kai-qiang,LIU Bin,et al.A KP-ABE Scheme Supporting Large Universe and Security Classification[J].ACTA ELECTRONICA SINICA,2023,51(09):2549-2557.
康萍,赵开强,刘彬等.支持大属性空间和安全分级的KP-ABE[J].电子学报,2023,51(09):2549-2557. DOI: 10.12263/DZXB.20210493.
KANG Ping,ZHAO Kai-qiang,LIU Bin,et al.A KP-ABE Scheme Supporting Large Universe and Security Classification[J].ACTA ELECTRONICA SINICA,2023,51(09):2549-2557. DOI: 10.12263/DZXB.20210493.
现有的KP-ABE(Key-Policy Attribute-Based Encryption)方案主要通过哈希函数实现对大属性空间的支持,安全性建立在随机预言模型下而非标准模型下;计算每个属性对应的密文子项或密钥子项,指数运算次数大于最大加密属性个数;不支持数据和用户安全分级.针对上述问题,本文提出了一种支持大属性空间和安全分级的KP-ABE方案.该方案通过编码函数而不是哈希函数将任意“属性名称:属性值”编码映射至有限域中的一个元素,实现对任意“属性名称:属性值”的支持并确保任意两个不同“属性名称:属性值”的编码值不同;结合强制访问控制思想,方案对密文和用户赋予不同的安全等级,只有用户安全等级不低于密文的安全等级时用户才能解密.最后对本文方案进行了安全性和性能分析,在标准模型下证明了该方案针对选择明文攻击是安全的;性能分析表明,所提出方案只需要进行2次指数运算,就能完成一个属性对应的密文子项或密钥子项的计算.
The existing KP-ABE (Key-Policy Attribute-Based Encryption) scheme mainly supports large universe by using hash function
and the security is built under the random oracle model instead of the standard model; the number of exponentiation operations is greater than the maximum number of attributes at the time of encryption when calculating the ciphertext components or key components for each attribute; it does not support data and user security classification. To address the above problems
this paper proposes a KP-ABE scheme that supports large universe and security classification. The scheme maps arbitrary “attribute name: attribute value” to an element in the finite field through an encoding function instead of hash function
enabling support for any “attribute name: attribute value” and ensuring that any two different “attribute name: attribute value” combinations are encoded with different values; combined with the idea of mandatory access control
the scheme assigns different security levels to ciphertext and user
and only when the user security level is not lower than the security level of the ciphertext can the user decrypt it. The scheme is proved to be secure against chosen plaintext attacks under the standard model; the performance analysis shows that the proposed scheme only needs to perform two exponential operations to complete the computation of the ciphertext components or key components corresponding to one attribute.
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