It is a tiny demo of implementation of some encryption and decryption algorithm.
Yes. It is simple and valueless. I write this just for giving some inspiration for the homework to those who will take the lesson taught by Li Hui in BUCT.
This tiny program can encrypt plaintext with affine cipher, multiplication cipher, vingenère, rsa, des and md5(actually it isn't an encryption way, but I put it in encryption just to be simple to implenment).
And also can decrypt plaintext with affine cipher, multiplication cipher, vingenère, rsa and des.
Both encryption and decryption type listed above can be done with file.
In this demo. There are 4 views which have respective functions. They are encrypt, decrypt, key generate and file.(yah..maybe the names may confuse you, and I admit the name isn't so accuracy..)
For each action Type. There are several encrypt or decrypt type. You can choose a type and input some strings acting as plaintext(or cryptograph, depending on you are doing a encryption or decryption) and see the encryption result(or decryption result).
encrypt and decrypt hello world with affine cipher.
note that affine cipher takes to integer value as key. And I input 11 and 7 here.
genrate keys for rsa encryption and decryption.
