Secure protocol transformation via “expansion”: from two-party to groups
CCS '99 Proceedings of the 6th ACM conference on Computer and communications security
Simple and fault-tolerant key agreement for dynamic collaborative groups
Proceedings of the 7th ACM conference on Computer and communications security
Provably authenticated group Diffie-Hellman key exchange
CCS '01 Proceedings of the 8th ACM conference on Computer and Communications Security
Communication-efficient group key agreement
Sec '01 Proceedings of the 16th international conference on Information security: Trusted information: the new decade challenge
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
Efficient and Secure Conference-Key Distribution
Proceedings of the International Workshop on Security Protocols
Round-Optimal Contributory Conference Key Agreement
PKC '03 Proceedings of the 6th International Workshop on Theory and Practice in Public Key Cryptography: Public Key Cryptography
A Security Analysis of the Cliques Protocols Suites
CSFW '01 Proceedings of the 14th IEEE workshop on Computer Security Foundations
Modeling insider attacks on group key-exchange protocols
Proceedings of the 12th ACM conference on Computer and communications security
Cryptanalysis of tripartite and multi-party authenticated key agreement protocols
Information Sciences: an International Journal
Constant-Round Authenticated Group Key Exchange with Logarithmic Computation Complexity
ACNS '07 Proceedings of the 5th international conference on Applied Cryptography and Network Security
ID-Based Group Password-Authenticated Key Exchange
IWSEC '09 Proceedings of the 4th International Workshop on Security: Advances in Information and Computer Security
(Password) authenticated key establishment: from 2-party to group
TCC'07 Proceedings of the 4th conference on Theory of cryptography
INDOCRYPT'06 Proceedings of the 7th international conference on Cryptology in India
Errors in computational complexity proofs for protocols
ASIACRYPT'05 Proceedings of the 11th international conference on Theory and Application of Cryptology and Information Security
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
N-Party encrypted diffie-hellman key exchange using different passwords
ACNS'05 Proceedings of the Third international conference on Applied Cryptography and Network Security
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
Constant-Round password-based group key generation for multi-layer ad-hoc networks
SPC'06 Proceedings of the Third international conference on Security in Pervasive Computing
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Protocols for group key exchange are cryptographic algorithms that describe how a group of parties communicating over a public network can come up with a common secret key. Due to their critical role in building secure multicast channels, a number of group key exchange protocols have been proposed over the years for a variety of settings. In this work, we present a new protocol for password-authenticated group key exchange in the model where the clients wishing to establish a common secret do not share any password between them but hold their individual password shared with a trusted server. This model is practical in that no matter how many different session keys for different groups a client wants to generate, he/she does not need to hold multiple passwords but only needs to remember a single password shared with the server. Our construction is generic. We assume a 3-party password-authenticated key exchange protocol and use it as a key component in building our password-authenticated GKE protocol. Our generic protocol requires no further long-term secrets than those used in the underlying 3-party protocol. This implies that if the given 3-party protocol is password-only authenticated, then our group key exchange protocol is password-only authenticated as well.