Cryptology ePrint Archive: Report 2006/205

ID-Based Ring Signature Scheme secure in the Standard Model

Man Ho Au and Joseph K. Liu and Y. H. Yuen and Duncan S. Wong

Abstract: The only known construction of ID-based ring signature schemes which maybe secure in the standard model is to attach certificates to non-ID-based ring signatures. This method leads to schemes that are somewhat inefficient and it is an open problem to find more efficient and direct constructions. In this paper, we propose two such constructions. Our first scheme, with signature size linear in the cardinality of the ring, is secure in the standard model under the computational Diffie-Hellman assumption. The second scheme, achieving constant signature size, is secure in a weaker attack model (the selective ID and weak chosen message model), under the Diffie-Hellman Inversion assumption.

Category / Keywords: Identity-based ring signature

Date: received 20 Jun 2006, withdrawn 1 Nov 2007

Contact author: ksliu9 at gmail com

Available format(s): (-- withdrawn --)

Version: 20071102:034012 (All versions of this report)

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