支持直接撤销的密文策略属性基加密方案

doi:10.11959/j.issn.1000-436x.2016091

Abstract

Abstract:

In order to support fine-grained attribute revocation in direct revocation mode an attribute-based encryption scheme with efficient revocation was proposed.The model of ABE supporting attribute revocation was given,and a con-crete scheme was constructed which was proven its security under the standard model.Compared to the existing related schemes,the size of ciphertext and private/secret key was reduced.In additional,the new scheme achieved fine-grained and immediate attribute revocation which is more suitable for the practical applications.

Key words: attribute-based encryption, attribute revocation, direct revocation, access control

Xi-xi YAN,Hui MENG. Ciphertext policy attribute-based encryption scheme supporting direct revocation[J]. Journal on Communications, 2016, 37(5): 44-50.

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References 18

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方案	密文长度	私钥长度	公钥长度	访问策略
文献[11]	2t+1+O(r)	(2k+2)log n	3logn+O(n)	与门
文献[12]BCP-ABE1	t+2	k+2	m+l+3+2n?1	LSSS
文献[12]BCP-ABE2	t+1+2r	k+4	m+l+7	LSSS
文献[13]	2t+3r+1	2k+1	2l+2n+2	LSSS
本文方案	t+2r+2	k+3	l+5	访问树

Ciphertext policy attribute-based encryption scheme supporting direct revocation

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