Cryptology ePrint Archive: Report 2007/011

Universally Composable Key-evolving Signature

Jin Zhou and TingMao Chang and YaJuan Zhang and YueFei Zhu

Abstract: The standard digital signature scheme can be easily subject to key exposure problem In order to overcome this problem; a feasible and effective approach is employed by key-evolving signature scheme. In this paper, we study key- evolving signature within the UC framework and propose an appropriate ideal functionality that captures the basic security requirements of key-evolving signature. Then, we present a generic way to transform a key-evolving signature scheme into a real-life protocol. Finally, we show that UC definition of security is equivalent to previous definition of security which is termed as EU-CMA security.

Category / Keywords: cryptographic protocols / Digital signature, Universally composable, Ideal functionality, Forward secure, Key-evolving, EU-CMA

Date: received 11 Jan 2007

Contact author: zhoujin820916 jojo at yahoo com cn

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Version: 20070119:011114 (All versions of this report)

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