基于密钥长度的数据加密标准算法改进-太赫兹科学与电子信息学报.pdfVIP

第 11 卷 第 1 期 太赫兹科学与电子信息学报 Vo1．11，No．1 2013 年 2 月 Journal of Terahertz Science and Electronic Information Technology Feb．，2013 文章编号：2095-4980(2013)01-0131-05 基于密钥长度的数据加密标准算法改进 李红芳，杨领军，曹三省 (中国传媒大学 信息工程学院，北京 100024) 摘 要 ：数据加密标准(DES)算法是典型的分组对称式私钥密码机制，在加密学研究领域中占 据着十分重要的地位，且对于以融合网络和物联网为代表的下一代网络中各类嵌入式加密应用而 言具有很好的适用性。本文简单介绍了 DES 算法原理及其安全性，主要针对 DES 算法易受穷举攻 击法的不足，依据 DES 算法本身的特点提出了改进措施，采用双密钥交叉加密，提高加密过程中 密钥的复杂度，增强抵抗攻击的能力，达到对 DES 算法安全性的改善。 关键词 ：数据加密标准算法 ；安全 ；双密钥 ；交叉加密 中图分类号 ：TN391 ；TP309.7 文献标识码 ：A Improved Data Encryption Standard algorithm based on the length of key LI Hong-fang，YANG Ling-jun，CAO San -xing (School of Information and Engineering, Communication University of China ，Beijing 100024 ，China) Abstract: Data Encryption Standard(DES) algorithm is a typical private password mechanism，and its group is symmetric. The algorithm is very important in the field of encryption study. It is adaptive to the applications for encryption in many different systems, especially in the embedded system of Internet of Things(IOT) and Convergence Networks in the next generation. Th is article simply introduces the principle and the safety of DES algorithm. According to the characteristics of the DES algorithm，an improved scheme is put forward in order to overcome its easily attacked shortcomings. This method adopts two keys to crosswise encrypt. It can improve the complexity of encryption key in the process and enhance the ability of resisting attack, therefore, the safety of DES algorithm is improved. Key words: Data Encryption St