title: On the security of a novel probabilistic signature based on bilinear square Diffie-Hellman problem and its extension.
abstract: Probabilistic signature scheme has been widely used in modern electronic commerce since it could provide integrity, authenticity, and nonrepudiation. Recently, Wu and Lin proposed a novel probabilistic signature (PS) scheme using the bilinear square Diffie-Hellman (BSDH) problem. They also extended it to a universal designated verifier signature (UDVS) scheme. In this paper, we analyze the security of Wu et al.'s PS scheme and UDVS scheme. Through concrete attacks, we demonstrate both of their schemes are not unforgeable. The security analysis shows that their schemes are not suitable for practical applications.
authors.affiliation: School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
authors.forename: Zhenguo
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Department of Electronic Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
authors.forename: Wenbo
authors.initials: W
authors.lastname: Shi
mesh_terms: D055641:Mathematical Concepts