密码学作业-古典密码体制的实践与分析,包括仿射密码，维吉尼亚密码，希尔密码和维吉尼亚和行置换的乘积密码体制 -Cryptography operations- the practice of classical cryptography and analysis, including affine password Virginia password, password, and Virginia Hill and replacement of the product line cryptosy