Cryptology ePrint Archive: Report 2006/421

Universally Composable Three-Party Key Distribution

Jin Zhou, TingMao Chang, YaJuan Zhang, YueFei Zhu

Abstract: In this paper, we formulate and realize a definition of security for three-party key distribution within the universally composable (UC) framework. That is, an appropriate ideal functionality that captures the basic security requirements of three-party key distribution is formulated. We show that UC definition of security for three-party key distribution protocol is strictly more stringent than a previous definition of security which is termed AKE-security. Finally, we present a real-life protocol that securely realizes the formulated ideal functionality with respect to non-adaptive adversaries.

Category / Keywords: secret-key cryptography / Key distribution, Universally composable, AKE-security

Date: received 16 Nov 2006

Contact author: ctm_jinglei at yahoo com cn

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Version: 20061119:194511 (All versions of this report)

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