Random oracles are practical: a paradigm for designing efficient protocols
CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
Entity authentication and key distribution
CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Refinement and extension of encrypted key exchange
ACM SIGOPS Operating Systems Review
Undetectable on-line password guessing attacks
ACM SIGOPS Operating Systems Review
Diffie-Hellman key distribution extended to group communication
CCS '96 Proceedings of the 3rd ACM conference on Computer and communications security
Strong password-only authenticated key exchange
ACM SIGCOMM Computer Communication Review
Public-key cryptography and password protocols: the multi-user case
CCS '99 Proceedings of the 6th ACM conference on Computer and communications security
Timestamps in key distribution protocols
Communications of the ACM
Provably authenticated group Diffie-Hellman key exchange
CCS '01 Proceedings of the 8th ACM conference on Computer and Communications Security
Three-party encrypted key exchange: attacks and a solution
ACM SIGOPS Operating Systems Review
A Secure Fault-Tolerant Conference-Key Agreement Protocol
IEEE Transactions on Computers
On the design of security protocols for mobile communications
ACISP '96 Proceedings of the First Australasian Conference on Information Security and Privacy
Key Establishment Protocols for Secure Mobile Communications: A Selective Survey
ACISP '98 Proceedings of the Third Australasian Conference on Information Security and Privacy
The Oracle Diffie-Hellman Assumptions and an Analysis of DHIES
CT-RSA 2001 Proceedings of the 2001 Conference on Topics in Cryptology: The Cryptographer's Track at RSA
Ciphers with Arbitrary Finite Domains
CT-RSA '02 Proceedings of the The Cryptographer's Track at the RSA Conference on Topics in Cryptology
Password-Authenticated Key Exchange between Clients with Different Passwords
ICICS '02 Proceedings of the 4th International Conference on Information and Communications Security
The Group Diffie-Hellman Problems
SAC '02 Revised Papers from the 9th Annual International Workshop on Selected Areas in Cryptography
Session-Key Generation Using Human Passwords Only
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
CRYPTO '01 Proceedings of the 21st Annual International Cryptology Conference on Advances in Cryptology
Efficient Password-Authenticated Key Exchange Using Human-Memorable Passwords
EUROCRYPT '01 Proceedings of the International Conference on the Theory and Application of Cryptographic Techniques: Advances in Cryptology
Dynamic Group Diffie-Hellman Key Exchange under Standard Assumptions
EUROCRYPT '02 Proceedings of the International Conference on the Theory and Applications of Cryptographic Techniques: Advances in Cryptology
Provably Authenticated Group Diffie-Hellman Key Exchange - The Dynamic Case
ASIACRYPT '01 Proceedings of the 7th International Conference on the Theory and Application of Cryptology and Information Security: Advances in Cryptology
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
Open Key Exchange: How to Defeat Dictionary Attacks Without Encrypting Public Keys
Proceedings of the 5th International Workshop on Security Protocols
Key Agreement Protocols and Their Security Analysis
Proceedings of the 6th IMA International Conference on Cryptography and Coding
Encrypted Key Exchange: Password-Based Protocols SecureAgainst Dictionary Attacks
SP '92 Proceedings of the 1992 IEEE Symposium on Security and Privacy
Authenticated key exchange secure against dictionary attacks
EUROCRYPT'00 Proceedings of the 19th international conference on Theory and application of cryptographic techniques
Provably secure password-authenticated key exchange using Diffie-Hellman
EUROCRYPT'00 Proceedings of the 19th international conference on Theory and application of cryptographic techniques
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
Provably Secure N-Party Authenticated Key Exchange in the Multicast DPWA Setting
Information Security and Cryptology
nPAKE+: a tree-based group password-authenticated key exchange protocol using different passwords
Journal of Computer Science and Technology
Enhancing Security of a Group Key Exchange Protocol for Users with Individual Passwords
ICCSA '09 Proceedings of the International Conference on Computational Science and Its Applications: Part II
AAECC'07 Proceedings of the 17th international conference on Applied algebra, algebraic algorithms and error-correcting codes
nPAKE+: a hierarchical group password-authenticated key exchange protocol using different passwords
ICICS'07 Proceedings of the 9th international conference on Information and communications security
Inscrypt'09 Proceedings of the 5th international conference on Information security and cryptology
Server-aided password-authenticated key exchange: from 3-party to group
HI'11 Proceedings of the 2011 international conference on Human interface and the management of information - Volume Part I
Cryptanalysis of two provably secure cross-realm C2C-PAKE protocols
INDOCRYPT'06 Proceedings of the 7th international conference on Cryptology in India
Password-based group key exchange secure against insider guessing attacks
CIS'05 Proceedings of the 2005 international conference on Computational Intelligence and Security - Volume Part II
Authenticated public key distribution scheme without trusted third party
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
Efficient and provably secure client-to-client password-based key exchange protocol
APWeb'06 Proceedings of the 8th Asia-Pacific Web conference on Frontiers of WWW Research and Development
Secure password-based authenticated group key agreement for data-sharing peer-to-peer networks
ACNS'06 Proceedings of the 4th international conference on Applied Cryptography and Network Security
Cryptanalysis of the n-party encrypted diffie-hellman key exchange using different passwords
ACNS'06 Proceedings of the 4th international conference on Applied Cryptography and Network Security
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
CANS'11 Proceedings of the 10th international conference on Cryptology and Network Security
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We consider the problem of password-authenticated group Diffie-Hellman key exchange among N parties, N–1 clients and a single-server, using different passwords. Most password-authenticated key exchange schemes in the literature have focused on an authenticated key exchange using a shared password between a client and a server. With a rapid change in modern communication environment such as ad-hoc networks and ubiquitous computing, it is necessary to construct a secure end-to-end channel between clients, which is a quite different paradigm from the existing ones. To achieve this end-to-end security, only a few schemes of three-party setting have been presented where two clients exchange a key using their own passwords with the help of a server. However, up until now, no formally treated and round efficient protocols which enable group members to generate a common session key with clients' distinct passwords have been suggested. In this paper we securely and efficiently extend three-party case to N-party case with a formal proof of security. Two provably secure N-party EKE protocols are suggested; N-party EKE-U in the unicast network and N-party EKE-M in the multicast network. The proposed N-party EKE-M is provable secure and provides forward secrecy. Especially, the scheme is of constant-round, hence scalable and practical.