Proceedings of the 2003 ACM workshop on Privacy in the electronic society
Attribute-Based Access Control with Hidden Policies and Hidden Credentials
IEEE Transactions on Computers
Attribute-based encryption for fine-grained access control of encrypted data
Proceedings of the 13th ACM conference on Computer and communications security
Certificate-Free Attribute Authentication
Cryptography and Coding '09 Proceedings of the 12th IMA International Conference on Cryptography and Coding
EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
Attribute-based signature and its applications
ASIACCS '10 Proceedings of the 5th ACM Symposium on Information, Computer and Communications Security
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Attribute-Based Group Signature (ABGS) allows a member of a group who possesses precise attributes to sign on behalf of others. Moreover, it allows a verifier to confirm that the signer indeed possesses the attributes claimed, when signing. Naturally, a user's attributes may hold confidential information, and hence must be protected. According to our observations, there is a scope for improvement in the existing ABGS schemes in efficiently providing anonymity of a user's attributes. Inspired by the original ABGS scheme by D. Khader, we propose a new ABGS scheme in this paper that uses Oblivious Signature-Based Envelope (OSBE) protocol to provide anonymity of user's attributes. Our construction is efficient in that the signature or the verification process eliminates exploiting any attributes.