Security of group key exchange protocols with different passwords

Password-based authenticated group key exchange protocols allow group users to jointly share a session key based on a human-memorizable password. In this paper, we present an undetectable online dictionary attack on N-EKE-D, a recent provably secure protocol designed to explicitly resist this type o...

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Main Author:	Raphael C.-W. Phan
Format:	Default Conference proceeding
Published:	2009
Subjects:	Mechanical engineering not elsewhere classified Password-authenticated key exchange Cryptanalysis Group Key indistinguishability Model Proof Undetectable online dictionary attack Mechanical Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/5686
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id	rr-article-9555020
record_format	Figshare
spelling	rr-article-95550202009-01-01T00:00:00Z Security of group key exchange protocols with different passwords Raphael C.-W. Phan (7168670) Mechanical engineering not elsewhere classified Password-authenticated key exchange Cryptanalysis Group Key indistinguishability Model Proof Undetectable online dictionary attack Mechanical Engineering not elsewhere classified Password-based authenticated group key exchange protocols allow group users to jointly share a session key based on a human-memorizable password. In this paper, we present an undetectable online dictionary attack on N-EKE-D, a recent provably secure protocol designed to explicitly resist this type of attack. Thus, our result contradicts the design goal. We also give a simple attack on the key indistinguishability of N-EKE-D and two N-EKE-M variants that exploits the definition of partnering in their security model. 2009-01-01T00:00:00Z Text Conference contribution 2134/5686 https://figshare.com/articles/conference_contribution/Security_of_group_key_exchange_protocols_with_different_passwords/9555020 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Mechanical engineering not elsewhere classified Password-authenticated key exchange Cryptanalysis Group Key indistinguishability Model Proof Undetectable online dictionary attack Mechanical Engineering not elsewhere classified
spellingShingle	Mechanical engineering not elsewhere classified Password-authenticated key exchange Cryptanalysis Group Key indistinguishability Model Proof Undetectable online dictionary attack Mechanical Engineering not elsewhere classified Raphael C.-W. Phan Security of group key exchange protocols with different passwords
description	Password-based authenticated group key exchange protocols allow group users to jointly share a session key based on a human-memorizable password. In this paper, we present an undetectable online dictionary attack on N-EKE-D, a recent provably secure protocol designed to explicitly resist this type of attack. Thus, our result contradicts the design goal. We also give a simple attack on the key indistinguishability of N-EKE-D and two N-EKE-M variants that exploits the definition of partnering in their security model.
format	Default Conference proceeding
author	Raphael C.-W. Phan
author_facet	Raphael C.-W. Phan
author_sort	Raphael C.-W. Phan (7168670)
title	Security of group key exchange protocols with different passwords
title_short	Security of group key exchange protocols with different passwords
title_full	Security of group key exchange protocols with different passwords
title_fullStr	Security of group key exchange protocols with different passwords
title_full_unstemmed	Security of group key exchange protocols with different passwords
title_sort	security of group key exchange protocols with different passwords
publishDate	2009
url	https://hdl.handle.net/2134/5686
_version_	1796742802538758144

Security of group key exchange protocols with different passwords

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