I have been assigned to compose an Excel sheet in which a message can be entered and the sheet will automatically encipher the message. It's basically cryptography. But to further demonstrate the process (this will be a presentation) the sheet also needs to be able to have a section in which an encrypted message can be entered and it will be deciphered.
Basically, I have to make a code that will go forwards into encryption and then backwards out of encryption.
My difficulties arise not from the encryption, but the decryption. Try as I might, I have had no luck getting there, so any help will be greatly appreciate. Thanks.