| 一种新的抗模差攻击SHA-1体制 |
| |
| 引用本文： | 高晓东,刘念,李子臣.一种新的抗模差攻击SHA-1体制[J].北京电子科技学院学报,2012,20(2):43-49. |
| |
| 作者姓名： | 高晓东 刘念 李子臣 |
| |
| 作者单位： | 西安电子科技大学通信工程学院,陕西西安710071 北京电子科技学院,北京100070;北京电子科技学院,北京,100070 |
| |
| 摘 要： | 消息修改技术和模减差分攻击方法对SHA-1构成严重安全性威胁。基于SHA-1存在无法抵抗模减差分攻击的安全性缺陷,提出一种对SHA-1的改进算法。该算法有效地增加了运用消息修改技术的困难,并且得到良好的差分扩散特性。由于改进Hash算法只改动了步函数,仅增加了一个加法和循环移位,没有改变信息填充方式和消息摘要长度,容易实现原有基于SHA-1的软硬件产品的升级。经证明并通过算法实现,得出改进SHA-1与标准SHA-1的效率相当。
|
| 关 键 词： | SHA-1 消息修改 模减差分 局部碰撞 |
A New SHA-1 System to Resist Modular Differential Attack |
| |
| GAO Xiao-dong,LIUNian LI Zi-chen.A New SHA-1 System to Resist Modular Differential Attack[J].Journal of Beijing Electronic Science & Technology Institute,2012,20(2):43-49. |
| |
| Authors: | GAO Xiao-dong LIUNian LI Zi-chen |
| |
| Affiliation: | Communication Engineering Institute, Xidian University, Xian Shanxi 710071, China Beijing Electronic Science and Technology Institute, Beijing ]000？0,China |
| |
| Abstract: | News modify technique and method of modular differential attack pose a serious security threat to SHA-1. Based on the fact that SHA - 1 security defects cannot resist modular differential attack, an im- provement algorithm of SHA-1 is proposed. This algorithm can effectively increase difficulties using news modify, and get good differential diffusion characteristic. Due to improved SHA-1 merely changed step function, only added a addition and cycle shift, did not change the filled information and digest length, therefore easy to implement to update original hardware and software based on SHA-1. Efficiency is alike between improved SHA-1 and standard SHA-1 through proving and realizing. |
| |
| Keywords: | SHA-1 news modify modular differential local collision |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
