[1]王平水.零知识数字签名方案中Hash值长度的研究[J].计算机技术与发展,2007,(06):170-172.
 WANG Ping-shui.Study on Length of Hash - Values for Digital Signature Schemes Based on Zero- Knowledge[J].,2007,(06):170-172.
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零知识数字签名方案中Hash值长度的研究()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2007年06期
页码:
170-172
栏目:
安全与防范
出版日期:
1900-01-01

文章信息/Info

Title:
Study on Length of Hash - Values for Digital Signature Schemes Based on Zero- Knowledge
文章编号:
1673-629X(2007)06-0170-03
作者:
王平水
安徽财经大学网络中心
Author(s):
WANG Ping-shui
Network Center of Anhui University of Finance & Economics
关键词:
数字签名单向Hash函数零知识证明
Keywords:
digital signature one - way Hash function zero - knowledge proof
分类号:
TP309
文献标志码:
A
摘要:
Hash函数已经被广泛用于各种数字签名方案中。在基于零知识概念的数字签名方案中,方案发明者宣称:所使用的Hash值的长度短至64-bits或72-bits即可达到2-64或者2-72的安全度。文中研究表明,在数字签名中由于存在来自签名者的生日攻击,如此短的Hash值并不能达到规定的安全度。并提出了一个简单的修改方案,使得在不增加计算复杂性的情况下来达到规定的安全度
Abstract:
Hash function has already been applied in all kinds of digital signature schemes. In digital signature schemes based on the zero- knowledge concept, it has been claimed that the length of Hash - values could be as short as 64 or 72 bits for the security of 2^-64 or 2^-72. Shows that signature schemes with such short Hash - values cannot achieve the stated security levels, due to the birthday attack by the signer. A simple modification is also presented, where the stated security levels can be obtained without increase of computational load

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备注/Memo

备注/Memo:
安徽省教育厅自然科学基金资助项目(2006KJ017C)王平水(1972-),男,安徽蚌埠人,副教授,硕士,研究方向为符号计算与网络信息安全
更新日期/Last Update: 1900-01-01