CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Fundamentals of Logic Design
Secure Anonymous Group Infrastructure for Common and Future Internet Applications
ACSAC '01 Proceedings of the 17th Annual Computer Security Applications Conference
Ciphertext-Policy Attribute-Based Encryption
SP '07 Proceedings of the 2007 IEEE Symposium on Security and Privacy
Provably secure ciphertext policy ABE
Proceedings of the 14th ACM conference on Computer and communications security
Collusion resistant broadcast encryption with short ciphertexts and private keys
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Privacy in encrypted content distribution using private broadcast encryption
FC'06 Proceedings of the 10th international conference on Financial Cryptography and Data Security
The VersaKey framework: versatile group key management
IEEE Journal on Selected Areas in Communications
Attribute-based on-demand multicast group setup with membership anonymity
Computer Networks: The International Journal of Computer and Telecommunications Networking
Attribute based data sharing with attribute revocation
ASIACCS '10 Proceedings of the 5th ACM Symposium on Information, Computer and Communications Security
Outsider-Anonymous broadcast encryption with sublinear ciphertexts
PKC'12 Proceedings of the 15th international conference on Practice and Theory in Public Key Cryptography
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In many applications, it is desired to dynamically establish temporary multicast groups for secure message delivery. It is also often the case that the group membership information itself is sensitive and needs to be well protected. However, existing solutions either fail to address the issue of membership anonymity or do not scale well for dynamically established groups. In this paper, we propose a highly scalable solution for dynamical multicast group setup and yet protecting group membership anonymity simultaneously. In the proposed solution, scalability and membership anonymity are achieved via a novel design that integrates both ciphertextpolicy attribute-based encryption (CP-ABE) and centralized flat table (CFT) techniques. In our design, multicast groups are specified through group member attributes represented through binary member ID only and thus achieves scalability. Also, high level of membership anonymity is guaranteed such that every group member knows nothing but his own group membership only. The proposed solution is also efficient in communication, that is, the ciphertext size is only O(n), where n is the length of a group member ID and independent to the group size.