密文长度恒定且属性直接可撤销的基于属性的加密
密文策略的基于属性的加密(Ciphertext-Policy Attribute-Based Encryption: CP-ABE)特别适合于云计算环境下的访问控制系统. 在大部分已有的CP-ABE方案中, 密文长度会随着访问策略的复杂性的增加而线性增大, 且属性撤销问题没有得到解决. 属性撤销机制是CP-ABE在实际应用中的一个基本要求, 与间接的属性撤销机制相比, 直接的属性撤销机制效率更高, 不存在由密钥更新所带来的性能瓶颈. 在已有的大部分支持属性撤销的CP-ABE方案中, 每次撤销事件的发生都要求对所有的密文进行更新. 提出了密文长度恒定且属性直接可撤销的CP-ABE方案. 在随机预...
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| Published in | Journal of Cryptologic Research Vol. 1; no. 5; p. 465 |
|---|---|
| Main Authors | , , , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
Beijing
Chinese Association for Cryptologic Research, Journal of Cryptologic Research
30.10.2014
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| Subjects | |
| Online Access | Get full text |
| ISSN | 2097-4116 |
| DOI | 10.13868/j.cnki.jcr.000044 |
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| Abstract | 密文策略的基于属性的加密(Ciphertext-Policy Attribute-Based Encryption: CP-ABE)特别适合于云计算环境下的访问控制系统. 在大部分已有的CP-ABE方案中, 密文长度会随着访问策略的复杂性的增加而线性增大, 且属性撤销问题没有得到解决. 属性撤销机制是CP-ABE在实际应用中的一个基本要求, 与间接的属性撤销机制相比, 直接的属性撤销机制效率更高, 不存在由密钥更新所带来的性能瓶颈. 在已有的大部分支持属性撤销的CP-ABE方案中, 每次撤销事件的发生都要求对所有的密文进行更新. 提出了密文长度恒定且属性直接可撤销的CP-ABE方案. 在随机预言机模型中, 基于判定性m-BDHE假设, 证明了新方案的安全性, 这里m表示系统中用户总数的一个上界. 在新方案中, 通过引入适用于多属性值环境的撤销辅助判断函数, 判断当属性撤销事件发生时, 是否需要对一个密文进行更新. 所提出的方案支持具有多个属性值和通配符的AND策略. 性能分析和比较表明新方案适用于实际应用, 特别是用户属性变化频繁且带宽资源受限的场景. |
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| AbstractList | 密文策略的基于属性的加密(Ciphertext-Policy Attribute-Based Encryption: CP-ABE)特别适合于云计算环境下的访问控制系统. 在大部分已有的CP-ABE方案中, 密文长度会随着访问策略的复杂性的增加而线性增大, 且属性撤销问题没有得到解决. 属性撤销机制是CP-ABE在实际应用中的一个基本要求, 与间接的属性撤销机制相比, 直接的属性撤销机制效率更高, 不存在由密钥更新所带来的性能瓶颈. 在已有的大部分支持属性撤销的CP-ABE方案中, 每次撤销事件的发生都要求对所有的密文进行更新. 提出了密文长度恒定且属性直接可撤销的CP-ABE方案. 在随机预言机模型中, 基于判定性m-BDHE假设, 证明了新方案的安全性, 这里m表示系统中用户总数的一个上界. 在新方案中, 通过引入适用于多属性值环境的撤销辅助判断函数, 判断当属性撤销事件发生时, 是否需要对一个密文进行更新. 所提出的方案支持具有多个属性值和通配符的AND策略. 性能分析和比较表明新方案适用于实际应用, 特别是用户属性变化频繁且带宽资源受限的场景. |
| Author | 李 晖 郑 东 张应辉 Ying-Hui, ZHANG ZHENG, Dong LI, Jin LI, Hui 李 进 |
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| Snippet | 密文策略的基于属性的加密(Ciphertext-Policy Attribute-Based Encryption: CP-ABE)特别适合于云计算环境下的访问控制系统. 在大部分已有的CP-ABE方案中, 密文长度会随着访问策略的复杂性的增加而线性增大, 且属性撤销问题没有得到解决.... |
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| Title | 密文长度恒定且属性直接可撤销的基于属性的加密 |
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