Information Systems Security I need the code in visual basic.net and GUI in Vb also

Information Systems Security You are asked to implement the S-DES block cipher using a programming language ( visual basic .net). In this assignment, you have to implement S-DES with 2 stages. That is the output of the previous cipher is the input of the next cipher. Similarly, in the decryption process, the output of the previous decoder is the input of the next decoder. The output would be a document of ciphertext. Users should be able to pick the encryption keys randomly. Users should also be able to decrypt the ciphertext documents. In the decryption process, The system's GUI must show the intermediate results of each stage (encryption/ decryption). The system must also be able to read an input text file and write The final output (ciphertext in encryption and plaintext in decryption) into another text file