| DES加密算法的一种改进方法 |
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| 引用本文： | 周文婷,朱姣姣.DES加密算法的一种改进方法[J].计算机安全,2012(9):47-50. |
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| 作者姓名： | 周文婷 朱姣姣 |
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| 作者单位： | 济宁职业技术学院;朗讯科技(中国)有限公司 |
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| 基金项目： | 国家“星火”计划(2011GA74038)资助项目 |
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| 摘 要： | DES算法是一种分组密码,通过反复使用加密组块替代和换位两种技术,经过16轮的变换后得到密文,安全性高,但是其分组比较短、密钥太短、密码生命周期短、运算速度较慢。首先简要介绍了DES加密算法的原理,流程及核心算法,然后对DES加密过程中的＂16轮迭代过程＂、＂扩展运算E＂以及＂S盒P盒运算＂三部分运算进行改进,大大提高了DES加密算法的运算速度。
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| 关 键 词： | DES加密算法 改进 扩展运算E S盒P盒运算 |
An Improvement Method to Implement the DES(Data Encryption Standard) Encryption Algorithm |
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| ZHOU Wen-ting,Zhu Jiao-jiao.An Improvement Method to Implement the DES(Data Encryption Standard) Encryption Algorithm[J].Network & Computer Security,2012(9):47-50. |
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| Authors: | ZHOU Wen-ting Zhu Jiao-jiao |
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| Affiliation: | 1.Jining Polytechinc,Jining,Shandong 272000,China;2.Lucent Technologies(China) Co.,Ltd.,Beijing 100738,China) |
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| Abstract: | The DES(Data Encryption Standard) encryption algorithm is one kind of block cipher,which is safer by using two technologies: substitution or transposition of the encrypt blocks repeatedly,get the ciphertext after 16 times of transformation,but the key and the life cycle are too short,computing speed is too slow.In this paper,the theory of the DES encryption is introduced first,then by the improvement of the "Extended Operations E","S-box & P-box computing",as well as the 16 times iterative process,DES encryption algorithm computing speed has been greatly improved. |
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| Keywords: | DES encryption algorithm improvement Extended Operations E S-box & P-box computing |
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