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A Generic Construction of Ciphertext-Policy attribute- based encryption Supporting attribute Revocation

China Communications 2014年第A01期11卷 93-100页

作者： WU Qiuxin CollegeofScience BeijingInformationScience&TechnologyUniversityBeijing100192PRChina

attribute-based encryption is drawing more attention with its inherent attractive properties which are potential to be widely used in the newly developing cloud computing. However, one of the main obstacles for its application is how to revoke the attributes of the users, though some ABE schemes have realized revocation, they mostly focused on the user revocation that revokes the user＇s whole attributes, or attribute revocation under the indirect revocation model such that all the users＇ private keys will be affected by the revocation. In this paper, we define the model of CP-ABE supporting the attribute revocation under the direct revocation model, in which the revocation list is embed in the ciphertext and none of the users＇ private keys will be affected by the revocation process. Then we propose a generic construction, and prove its security with the decision q-BDHE assumption.

关键词： attribute revocation attribute based encryption ciphertext-Policy generic construction.

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A function private attribute based encryption

A function private attribute based encryption

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第十一届全国博士生学术年会——信息技术与安全专题

作者：韩斐秦静山东大学数学学院

Users are inclined to share sensitive data in a remote server if strong security mechanism is in *** encryption satisfies the need of users to execute a search on encrypted data Previous schemes are vulnerable to keyword guessing attack（KGA）,some work has done to prevent this *** Crypto 2013,*** proposed a novel security definition,function private,for public key encryption *** is to prevent secret key from leaking information to malicious *** searchable encryption,trapdoor of searching keyword can be seen as secret ***,using this technique can efficiently resistant keyword guessing *** this paper,we propose an attribute based encryption which is function private,then extend this scheme to a searchable attribute based encryption which keyword guessing secure.

关键词： earchable encryption attribute based encryption Function private keyword guessing attack

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A CONSTRUCTION OF CIPHERTEXT-POLICY attribute-based encryption SUPPORTING attribute REVOCATION

A CONSTRUCTION OF CIPHERTEXT-POLICY ATTRIBUTE-BASED ENCRYPTI...

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2012 IEEE 2nd International Conference on Cloud Computing and Intelligence Systems

作者： Quxin Wu Han Li School of Applied Science Beijing Information Science and Technology University

attribute-based encryption is drawing more attention with its inherent attractive properties which are potential to be widely used in the newly developing cloud computing. However, one of the main obstacles for its application is how to revoke the attributes of the users, this problem is inevitable in practice and also hard to *** some ABE schemes have realized revocation, they mostly focused on the user revocation that revokes the user’s whole attributes, or attribute revocation under the indirect revocation model such that all the users’ private keys will be affected for revocation. In this paper, we first define the model of CP-ABE supporting the attribute revocation under the direct revocation model, in which the revocation list is embed in the ciphertext and none of the users’ private keys will be affected by the revocation process. Then we propose a construction, and reduce its security to the decision q-BDHE assumption.

关键词： attribute revocation attribute based encryption Ciphertext-Policy

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