Cryptanalysis of a signature scheme without using one-way Hash functions

GUO Li-Feng; LI Yong; HU Lei

doi:10.7523/j.issn.2095-6134.2008.5.019

Journal of University of Chinese Academy of Sciences >

2008 , Vol. 25 >Issue 5: 698 - 700

DOI: https://doi.org/10.7523/j.issn.2095-6134.2008.5.019

Cryptanalysis of a signature scheme without using one-way Hash functions

GUO Li-Feng ,
LI Yong ,
HU Lei

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1State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences,
Beijing 100049, China; 2 School of Electronics and Information Engineering,
Beijing Jiaotong University, Beijing 100044, China; 3 Beijing Municipal Commission of Education, Key Laboratory of Communication & Information Systems, Beijing Jiaotong
University, Beijing 100044, China

Received date: 1900-01-01

Revised date: 1900-01-01

Online published: 2008-09-15

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Abstract

In 2004, Chang, et al. proposed a digital signature scheme without
using one-way hash function and message redundancy schemes. But Zhang
showed that the scheme can be forged. In order to overcome Zhang’s attack, Zhang et al. demonstrated an improved signature scheme based on Chang et al.’s signature scheme and analyzed the security of the improved scheme. But
in this paper, we identify a simple attack to show Zhang, et al.’s scheme is still
not secure. To resist this attack, the hash function and message redundancy
schemes may be still used.

Key words： digital signature; message recovery; redundancy message; Hash
message

Cite this article

GUO Li-Feng , LI Yong , HU Lei . Cryptanalysis of a signature scheme without using one-way Hash functions[J]. Journal of University of Chinese Academy of Sciences, 2008 , 25(5) : 698 -700 . DOI: 10.7523/j.issn.2095-6134.2008.5.019

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