CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Secure group communications using key graphs
IEEE/ACM Transactions on Networking (TON)
Key management for restricted multicast using broadcast encryption
IEEE/ACM Transactions on Networking (TON)
Key Agreement in Dynamic Peer Groups
IEEE Transactions on Parallel and Distributed Systems
Identity-Based Encryption from the Weil Pairing
SIAM Journal on Computing
The LSD Broadcast Encryption Scheme
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
Secure Integration of Asymmetric and Symmetric Encryption Schemes
CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
Efficient Trace and Revoke Schemes
FC '00 Proceedings of the 4th International Conference on Financial Cryptography
Key Establishment in Large Dynamic Groups Using One-Way Function Trees
IEEE Transactions on Software Engineering
Secure Group Communication Using Robust Contributory Key Agreement
IEEE Transactions on Parallel and Distributed Systems
Tree-based group key agreement
ACM Transactions on Information and System Security (TISSEC)
A scalable multicast key management scheme for heterogeneous wireless networks
IEEE/ACM Transactions on Networking (TON)
Resource-aware conference key establishment for heterogeneous networks
IEEE/ACM Transactions on Networking (TON)
Distributed collaborative key agreement and authentication protocols for dynamic peer groups
IEEE/ACM Transactions on Networking (TON)
JET: dynamic join-exit-tree amortization and scheduling for contributory key management
IEEE/ACM Transactions on Networking (TON)
Optimizing Rekeying Cost for Contributory Group Key Agreement Schemes
IEEE Transactions on Dependable and Secure Computing
Asymmetric Group Key Agreement
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
Adaptive Security in Broadcast Encryption Systems (with Short Ciphertexts)
EUROCRYPT '09 Proceedings of the 28th Annual International Conference on Advances in Cryptology: the Theory and Applications of Cryptographic Techniques
A generalization of DDH with applications to protocol analysis and computational soundness
CRYPTO'07 Proceedings of the 27th annual international cryptology conference on Advances in cryptology
Collusion resistant broadcast encryption with short ciphertexts and private keys
CRYPTO'05 Proceedings of the 25th annual international conference on Advances in Cryptology
Pairing-Based cryptography at high security levels
IMA'05 Proceedings of the 10th international conference on Cryptography and Coding
Bridging broadcast encryption and group key agreement
ASIACRYPT'11 Proceedings of the 17th international conference on The Theory and Application of Cryptology and Information Security
On the efficient implementation of pairing-based protocols
IMACC'11 Proceedings of the 13th IMA international conference on Cryptography and Coding
IEEE Wireless Communications
A conference key distribution system
IEEE Transactions on Information Theory
Provably Secure Constant Round Contributory Group Key Agreement in Dynamic Setting
IEEE Transactions on Information Theory
Skipping, Cascade, and Combined Chain Schemes for Broadcast Encryption
IEEE Transactions on Information Theory
The VersaKey framework: versatile group key management
IEEE Journal on Selected Areas in Communications
ARSA: An Attack-Resilient Security Architecture for Multihop Wireless Mesh Networks
IEEE Journal on Selected Areas in Communications
AMOEBA: Robust Location Privacy Scheme for VANET
IEEE Journal on Selected Areas in Communications
IEEE Transactions on Parallel and Distributed Systems
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The problem of efficiently and securely broadcasting to a remote cooperative group occurs in many newly emerging networks. A major challenge in devising such systems is to overcome the obstacles of the potentially limited communication from the group to the sender, the unavailability of a fully trusted key generation center, and the dynamics of the sender. The existing key management paradigms cannot deal with these challenges effectively. In this paper, we circumvent these obstacles and close this gap by proposing a novel key management paradigm. The new paradigm is a hybrid of traditional broadcast encryption and group key agreement. In such a system, each member maintains a single public/secret key pair. Upon seeing the public keys of the members, a remote sender can securely broadcast to any intended subgroup chosen in an ad hoc way. Following this model, we instantiate a scheme that is proven secure in the standard model. Even if all the nonintended members collude, they cannot extract any useful information from the transmitted messages. After the public group encryption key is extracted, both the computation overhead and the communication cost are independent of the group size. Furthermore, our scheme facilitates simple yet efficient member deletion/ addition and flexible rekeying strategies. Its strong security against collusion, its constant overhead, and its implementation friendliness without relying on a fully trusted authority render our protocol a very promising solution to many applications.