(Convertible) undeniable signatures without random oracles

Authors

Tsz Hon Yuen, University of WollongongFollow
Man Ho Allen Au, University of WollongongFollow
Joseph K. Liu, University of Bristol
Willy Susilo, University of WollongongFollow

RIS ID

22126

Publication Details

Yuen, T. Hon., Au, M. Ho., Liu, J. K. & Susilo, W. (2007). (Convertible) undeniable signatures without random oracles. In International Conference on Information and Communications Security, December 12-15, Zhengzhou, China. Lecture Notes in Computer Science, 4861 (December), 83-97.

Abstract

We propose a convertible undeniable signature scheme without random oracles. Our construction is based on Waters’ and Kurosawa and Heng’s schemes that were proposed in Eurocrypt 2005. The security of our scheme is based on the CDH and the decision linear assumption. Comparing only the part of undeniable signatures, our scheme uses more standard assumptions than the existing undeniable signatures without random oracles due to Laguillamie and Vergnaud.