efficient ciphertext policy attribute-based encryption with constant-size ciphertext and constant computation-cost

	efficient ciphertext policy attribute-based encryption with constant-size ciphertext and constant computation-cost
	Chen Cheng ; Zhang Zhenfeng ; Feng Dengguo
	2011
会议名称	5th International Conference on Provable Security, ProvSec 2011
会议日期	16-Oct
会议地点	Xi'an, China
关键词	Efficiency Hash functions
页码	84-101
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.
收录类别	EI
会议主办者	The National Natural Science Foundation of China (NSFC); Xidian Univ., Key Lab. Comput. Networks; Inf. Secur., Minist. Educ.
会议录	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
会议录出版地	Germany
ISSN号	3029743
ISBN号	9783642243158
内容类型	会议论文
源URL	[http://124.16.136.157/handle/311060/14317]
专题	软件研究所_信息安全国家重点实验室_会议论文
推荐引用方式 GB/T 7714	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.