Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
Ciphertext-Policy Attribute-Based Encryption
SP '07 Proceedings of the 2007 IEEE Symposium on Security and Privacy
Future Generation Computer Systems
Attribute-sets: a practically motivated enhancement to attribute-based encryption
ESORICS'09 Proceedings of the 14th European conference on Research in computer security
Achieving secure, scalable, and fine-grained data access control in cloud computing
INFOCOM'10 Proceedings of the 29th conference on Information communications
Hierarchical attribute-based encryption for fine-grained access control in cloud storage services
Proceedings of the 17th ACM conference on Computer and communications security
Fuzzy identity-based encryption
EUROCRYPT'05 Proceedings of the 24th annual international conference on Theory and Applications of Cryptographic Techniques
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Cloud computing has emerged as the most influential paradigm in recent years. The new computing technology requires users to entrust their data to the cloud provider, which leads to security issues on the outsourced data. In order to achieve scalable, fine-grained and flexible access control for cloud computing, we extends Ciphertext-Policy Attribute-Set-Based Encryption (CP-ASBE) by building in a hierarchical structure to obtain Hierarchical Attribute-Set-Based Encryption (HASBE) for cloud computing. The proposed scheme inherits flexibility in supporting compound attributes, and achieves scalability due to the hierarchical structure. More efficient user revocation is achieved because of the use of attribute-set which allows us incrementally update user's expiration time. We analyze the proposed scheme, and it is showed that the scheme is not only efficient and flexible in dealing with access control for cloud computing, but also has the same security as CP-ASBE.