Applied cryptography (2nd ed.): protocols, algorithms, and source code in C
Applied cryptography (2nd ed.): protocols, algorithms, and source code in C
Multicast security and its extension to a mobile environment
Wireless Networks
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)
New constructions for multicast re-keying schemes using perfect hash families
Proceedings of the 7th ACM conference on Computer and communications security
Reliable group rekeying: a performance analysis
Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
An authorization infrastructure for nomadic computing
SACMAT '02 Proceedings of the seventh ACM symposium on Access control models and technologies
Efficient Security for Large and Dynamic Multicast Groups
WETICE '98 Proceedings of the 7th Workshop on Enabling Technologies: Infrastructure for Collaborative Enterprises
EHBT: An Efficient Protocol for Group Key Management
NGC '01 Proceedings of the Third International COST264 Workshop on Networked Group Communication
ELK, a New Protocol for Efficient Large-Group Key Distribution
SP '01 Proceedings of the 2001 IEEE Symposium on Security and Privacy
The VersaKey framework: versatile group key management
IEEE Journal on Selected Areas in Communications
International Journal of Ad Hoc and Ubiquitous Computing
Information Theoretic Security
Foundations and Trends in Communications and Information Theory
Scalable key management for secure multicast communication in the mobile environment
Pervasive and Mobile Computing
Secure multicast in IPTV services
Computer Networks: The International Journal of Computer and Telecommunications Networking
Hierarchies of keys in secure multicast communications
Journal of Computer Security
Key management with host mobility in dynamic groups
Proceedings of the 3rd international conference on Security of information and networks
Adaptive multicast key management for tactical networks
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
On performance of group key distribution techniques when applied to IPTV services
Computer Communications
Keeping group communications private: An up-to-date review on centralized secure multicast
CISIS'11 Proceedings of the 4th international conference on Computational intelligence in security for information systems
SKiMPy: a simple key management protocol for MANETs in emergency and rescue operations
ESAS'05 Proceedings of the Second European conference on Security and Privacy in Ad-Hoc and Sensor Networks
ICCNMC'05 Proceedings of the Third international conference on Networking and Mobile Computing
Journal of Computational and Applied Mathematics
Hierarchical approaches for multicast based on Euclid's algorithm
The Journal of Supercomputing
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This paper presents an efficient algorithm for the secure group key management of mobile users. The most promising protocols to deal with group key management are those based on logical key hierarchy (LKH). The LKH model reduces to logarithmic size the resources needed: computation time, message exchanged, and memory space. In the framework of the LKH model, we present a new protocol LKH++ that outperforms the other proposed solutions in the literature. Such performance improvements are obtained exploiting both the properties of one-way hash functions and the information that the users already share in the LKH model. In particular, when a user eviction occurs in LKH++, each remaining user autonomously constructs a new key along the path from the evicted user to the root as a function of a specific logical child key. Therefore, the center can carry on the re-keying phase by distributing only a subset of the new keys and by reducing the number of communications to the users. When a join occurs, a minimal information is broadcast, while most of the communications are unicast toward just the joining user. The proposed LKH++ protocol establishes a group communication of n users requiring to unicast ((n-1)logn)/2 keys, while standard algorithms require to deliver nlogn keys. Such a solution allows the users to form promptly a new group if the wireless ad hoc network should be reconfigured. Moreover, the proposed extension to deal with mass leave and mass join allows a considerable savings in the messages sent by the center, as well as in the computations required by both the center and the users. Finally, the LKH++ protocol enhances the reliability of the key management due to the reduced number of communications needed in the re-keying phase.