四种加密解密算法的源代码：移位密码、仿射密码、维吉尼亚密码以及置换密码。-four encryption and decryption algorithm source code : shift password, affine passwords, Virginia passwords and password replacement.

四种加密解密算法的源代码：移位密码、仿射密码、维吉尼亚密码以及置换密码。-four encryption and decryption algorithm source code : shift password, affine passwords, Virginia passwords and password replacement.