摘要
本文介绍了两种简单实用的民用密码体制:二维随机代换密码体制和一种伪随机变换密码体制,该两种密码体制的密钥都是一具有随机性质的整数序列,密钥整数和个数的取值是无界和不约束的,所以两种密码体制对统计攻击具有强大的抗御力.作者还把该两种瑟码体制与美国1977年公布的DES体制作了比较,证明了以穷举密钥法是无法攻破这两种密码体制的.本文介绍的两种密码体制在民用保密信息的传递系统中可以应用,有一定价值.
Here is two handy cipher systems: 2-dimension random replacement and pseudo-random transformation. The key of them is a sequence of random integers. It can not be found out by cipher analyst at all. Their algorithm is simple, but the break probability is negligible even though the algorithm and trans-table published. Assembly programs have been designed. In appendix, designs of the systems and performance of 2-dimension system are there.
