演化密码与DES密码的演化设计

Evolutionary cryptosystems and evolutionary design for DES

本文提出演化密码的概念和用演化计算设计密码的方法。演化密码在理论和应用中都有重要意义。本文对DES的核心部件S盒进行了实际演化,得到一种用演化计算设计S盒的方法,并获得了一批安全性能优异的S盒。用演化方法设计出一族安全性能渐强的S盒或其他部件,分别以这些S盒或其他部件构造DES,就可使DES密码体制本身进行演化,而且安全性能愈来愈强。

This paper proposes the concept of evolutionary cryptosystems and an evolutionary method for designing cryptosystems. With the evolutionary computing we can fast generate a group of S-boxes of DES which are more secure than the old ones of DES. The evolutionary computing can also be used in designing the general cryptosystems (for example AES). In other aspect using a group of increasingly secure S-boxes we can construct the evolutionary cryptosystem of type DES. Generally the evolutionary cryptosystems have the more powerful secure function than usual ones