Cryptology ePrint Archive: Report 2004/288

A New Designated Confirmer Signature Variant with Intended Recipient

Yong Li and Dingyi Pei

Abstract: Previous designated confirmer signature schemes were less efficient because complex zero-knowledge proof employed in confirmation and disavowal protocol. In this paper, we propose a new efficient signature scheme which is recipient-specific and confirmer-specific. The new scheme is transformed from ID-based chameleon signature and inherits its advantage in simplicity and efficiency. The scheme's security relies on the underlying secure chameleon signature and public key encryption scheme. We also considers the case of confirmer as an adversary in security proof.

Category / Keywords: public-key cryptography / digital signature

Date: received 3 Nov 2004, withdrawn 25 Jul 2005

Contact author: liy_bs at mails gscas ac cn

Available format(s): (-- withdrawn --)

Version: 20050725:063649 (All versions of this report)

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