级联加密技术及其在安全电子邮件中的应用

摘要

The security problem of email transmission on the Internet was considered A scheme of cascade cipher based on improved hyperchaotic sequences combined with 3DES algorithm was proposed. Based on hyperchaolic system, the real chaotic sequences were pretreated and quantified. The improved sequences, which have stronger pseudo-random, better correlation and irreversible characteristics were validated by the NIST test. An example of email transmission u-sing the cascade cipher system was presented to demonstrate its performance.%为了保护电子邮件传输的安全性,提出了一种级联加密的保密通信技术.基于预处理和量化处理对超混沌系统产生的序列进行了改进,改进后的序列通过了NIST随机性测试,具有更理想的相关性、更强的伪随机性及不可逆性.级联加密技术可发挥两者各自的优势,提高电子邮件传输的安全性.分析和应用表明了该级联加密系统的可靠性.