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一、引言信息情报对于国家安全、经济发展、军事行动都有非常重要的意义。在某种意义可以说信息情报就是财富,就是技术,就是军队,就是生命。众所周知,在过去的两次世界大战中就充满了惊心动魄的密码战。现在它在军事上可称为五维战场之一,即陆、海、空、密码战、电子战。密码战线无和平,今后密码对抗将更加激烈。密码将深入和影响各个领域,甚至影响历史的进程。密码学包括密码编码学和密码分析学。目前,它已发展成为独立的重要科学,成为自然科学百花园中的一朵娇艳的鲜花。究其密码发展史,可谓渊远流长。它经历了由简
I. Introduction Information and intelligence have very important meanings for national security, economic development and military operations. In a certain sense, it can be said that information and intelligence are wealth, that is, technology, that is, the army is life. As we all know, in the past two world wars is full of thrilling password war. Now it can be called one of the five-dimensional battlefield in the military, that is, land, sea, air, password war, electronic warfare. No peace front of the password, the future password confrontation will be more intense. The password will penetrate and affect various fields, and even affect the course of history. Cryptography includes cryptography and cryptanalysis. At present, it has developed into an independent and important science, becoming a tender flower in the natural sciences garden. The history of cryptography can be described as long history. It has gone through Jane