用于实现各种古典加密法,包括凯撒,置换,列置换,仿射加密法,vigenere加密法和现代加密法中的DH密钥交换,RSA,DES加密法等等操作-Used to implement a variety of classical cryptography, including Julius Caesar, replacement, column permutation, affine cipher, vigenere encryption method and encryption method in