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Secure group key establishment revisited.

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Title: Secure group key establishment revisited.
Authors: Bohli, Jens-Matthias1 bohli@ira.uka.de, González Vasco, María2 mariaisabel.vasco@urjc.es, Steinwandt, Rainer3 rsteinwa@fau.edu
Source: International Journal of Information Security. Jul2007, Vol. 6 Issue 4, p243-254. 12p. 3 Illustrations.
Subjects: Data protection, Computer security conferences, Public key infrastructure (Computer security), Data security, Database security, Computer network security
Abstract: We examine the popular proof models for group key establishment of Bresson et al. (LNCS 2248: 290–309, 2001; Proceedings of the 8th ACM conference on computer and communications security (CCS-8), 2001) and point out missing security properties addressing malicious protocol participants. We show that established group key establishment schemes from CRYPTO 2003 and ASIACRYPT 2004 do not fully meet these new requirements. Next to giving a formal definition of these extended security properties, we prove a variant of the explored proposal from ASIACRYPT 2004 secure in this stricter sense. Our proof builds on the Computational Diffie Hellman (CDH) assumption and the random oracle model. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Information Security is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: We examine the popular proof models for group key establishment of Bresson et al. (LNCS 2248: 290–309, 2001; Proceedings of the 8th ACM conference on computer and communications security (CCS-8), 2001) and point out missing security properties addressing malicious protocol participants. We show that established group key establishment schemes from CRYPTO 2003 and ASIACRYPT 2004 do not fully meet these new requirements. Next to giving a formal definition of these extended security properties, we prove a variant of the explored proposal from ASIACRYPT 2004 secure in this stricter sense. Our proof builds on the Computational Diffie Hellman (CDH) assumption and the random oracle model. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of International Journal of Information Security is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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