计算机技术与发展2016，Vol.26Issue(11)：93-96,4.DOI:10.3969/j.issn.1673-629X.2016.11.021
一种前向安全数字签名方案的分析及改进
Analysis and Improvement for a Digital Signature Scheme of Forward Security
摘要
Abstract
Forward security can effectively reduce the damage caused by exposure of the secret key in the past time period,but may affect the signature in the future period. In order to solve this problem,a strong forward-secure signature is proposed. Firstly,Liu Yali’ s ElGa-mal forward-secure signature scheme in 2010 based on n root of module m is analyzed,and this scheme is not backward security,which means it can’ t guarantee the signature security in the future period. Then,by using a one-way hash chain,the key updating and signature algorithm is improved effectively. A new digital signature scheme based on ElGamal is presented on the basis of Liu’ s scheme and ana-lyzed. The result shows that the new scheme is correct and feasible,with forward and backward security.关键词
前向安全/后向安全/数字签名/ElGamal/单向散列链Key words
forward-secure/backward-secure/digital signature/ElGamal/one-way hash chain分类
信息技术与安全科学引用本文复制引用
李顺波,黄光球,彭家龙..一种前向安全数字签名方案的分析及改进[J].计算机技术与发展,2016,26(11):93-96,4.基金项目
国家自然科学基金资助项目(11471255,11526161) （11471255,11526161）
陕西省自然科学基金(2014JQ1027,2015JQ1014) （2014JQ1027,2015JQ1014）
陕西省教育厅基金(2013JK0589) （2013JK0589）
西安建筑科技大学基金(RC1338,RC1438,JC1321,JC1416) （RC1338,RC1438,JC1321,JC1416）
