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题名:
efficient ciphertext policy attribute-based encryption with constant-size ciphertext and constant computation-cost
作者: Chen Cheng ; Zhang Zhenfeng ; Feng Dengguo
会议文集: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
会议名称: 5th International Conference on Provable Security, ProvSec 2011
会议日期: 16-Oct
出版日期: 2011
会议地点: Xi'an, China
关键词: Efficiency ; Hash functions
出版地: Germany
收录类别: EI
ISSN: 3029743
ISBN: 9783642243158
部门归属: (1) State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China
主办者: The National Natural Science Foundation of China (NSFC); Xidian Univ., Key Lab. Comput. Networks; Inf. Secur., Minist. Educ.
英文摘要: Attribute-based encryption provides good solutions to the problem of anonymous access control by specifying access policies among private keys or ciphertexts over encrypted data. In ciphertext-policy attribute-based encryption (CP-ABE), each user is associated with a set of attributes, and data is encrypted with access structures on attributes. A user is able to decrypt a ciphertext if and only if his attributes satisfy the ciphertext access structure. CP-ABE is very appealing since the ciphertext and data access policies are integrated together in a natural and effective way. Most current CP-ABE schemes incur large ciphertext size and computation costs in the encryption and decryption operations which depend at least linearly on the number of attributes involved in the access policy. In this paper, we present two new CP-ABE schemes, which have both constant-size ciphertext and constant computation costs for a non-monotone AND gate access policy, under chosen plaintext and chosen ciphertext attacks. The security of first scheme can be proven CPA-secure in standard model under the decision n-BDHE assumption. And the security of second scheme can be proven CCA-secure in standard model under the decision n-BDHE assumption and the existence of collision-resistant hash functions. Our scheme can also be extended to the decentralizing multi-authority setting. © 2011 Springer-Verlag.
内容类型: 会议论文
URI标识: http://ir.iscas.ac.cn/handle/311060/14317
Appears in Collections:信息安全国家重点实验室_会议论文

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Recommended Citation:
Chen Cheng,Zhang Zhenfeng,Feng Dengguo. efficient ciphertext policy attribute-based encryption with constant-size ciphertext and constant computation-cost[C]. 见:5th International Conference on Provable Security, ProvSec 2011. Xi'an, China. 16-Oct.
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