Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
ACM Transactions on Information and System Security (TISSEC)
Group Diffie-Hellman Key Exchange Secure against Dictionary Attacks
ASIACRYPT '02 Proceedings of the 8th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
An Integrated Solution for Secure Group Communication in Wide-Area Networks
ISCC '01 Proceedings of the Sixth IEEE Symposium on Computers and Communications
Encrypted Key Exchange: Password-Based Protocols SecureAgainst Dictionary Attacks
SP '92 Proceedings of the 1992 IEEE Symposium on Security and Privacy
Security proofs for an efficient password-based key exchange
Proceedings of the 10th ACM conference on Computer and communications security
Secure Group Communication Using Robust Contributory Key Agreement
IEEE Transactions on Parallel and Distributed Systems
International Journal of Wireless and Mobile Computing
A secure and scalable Group Key Exchange system
Information Processing Letters
A scalable password-based group key exchange protocol in the standard model
ASIACRYPT'06 Proceedings of the 12th international conference on Theory and Application of Cryptology and Information Security
Dynamic group key agreement in tree-based setting
ACISP'05 Proceedings of the 10th Australasian conference on Information Security and Privacy
One-Time verifier-based encrypted key exchange
PKC'05 Proceedings of the 8th international conference on Theory and Practice in Public Key Cryptography
Password-Based authenticated key exchange in the three-party setting
PKC'05 Proceedings of the 8th international conference on Theory and Practice in Public Key Cryptography
Simple password-based encrypted key exchange protocols
CT-RSA'05 Proceedings of the 2005 international conference on Topics in Cryptology
Password-Based group key exchange in a constant number of rounds
PKC'06 Proceedings of the 9th international conference on Theory and Practice of Public-Key Cryptography
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This paper presents an efficient solution to the group key exchange problem in the password-based scenario. Our scheme can combine existing group protocols to get a hybrid group key exchange protocol which is efficient in terms of both computation and communication when the number of group users is very large. Our solution allows users to securely join and leave the group at any time--the so-called dynamic case. Moreover, we prove its security in the random oracle model.