| 基于前缀码的DES算法改进研究 |
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| 引用本文： | 谢志强,高鹏飞,杨静.基于前缀码的DES算法改进研究[J].计算机工程与应用,2009,45(9):92-94. |
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| 作者姓名： | 谢志强 高鹏飞 杨静 |
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| 作者单位： | 1.哈尔滨理工大学 计算机科学与技术系，哈尔滨 150080 2.哈尔滨工程大学 计算机科学与技术系，哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金，黑龙江省自然科学基金，黑龙江省教育厅海外学人重点科研资助项目 |
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| 摘 要： | DES算法自出现以来便面对许多威胁，根据DES算法易受穷举攻击法、选择明文攻击法等方法攻击的缺陷，提出了一种新的基于前缀码的改进方案。通过改变子密钥的顺序来提高抵抗某些攻击的能力，在基本不影响DES算法效率的前提下，很好地提高了DES算法的安全性。
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| 关 键 词： | 数据加密标准算法 前缀码 加密 解密 改进 |
| 收稿时间： | 2008-1-28 |
| 修稿时间： | 2008-4-8
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Research on improved algorithm of DES based on prefix codes |
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| XIE Zhi-qiang,GAO Peng-fei,YANG Jing.Research on improved algorithm of DES based on prefix codes[J].Computer Engineering and Applications,2009,45(9):92-94. |
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| Authors: | XIE Zhi-qiang GAO Peng-fei YANG Jing |
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| Affiliation: | 1.Department of Computer Science and Technology，Harbin University of Science and Technology，Harbin 150080，China 2.Department of Computer Science and Technology，Harbin Engineering University，Harbin 150001，China |
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| Abstract: | DES algorithm has been facing to a lot of threat since it came out.It can be attacked easily by exhaustion attack method and chosen plaintext attack method.According to this defect of DES algorithm,this paper puts forward a kind of improved method which is based on prefix codes.By the improvement of the adjustment of the sub-key's order,the algorithm can advance the ability to resist some attacks.With the improvement it has no effect on the efficiency,but can enhance the security greatly. |
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| Keywords: | Data Encryption Standard（DES） algorithm prefix codes encryption decryption improvement |
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