Does anyone know how to create a Vigenere Cryptosystem on Mathematica? I'm attempting to encrypt and decrypt a message. I haven't found any tutorials.
There is an implementation in the Demonstrations Project.
I followed your link to the Demo. Windows 10, Firefox 63.0.3. However the Demo does not load. This is what I see, like forever:
Closed Firefox. Opened the old and trusty Internet Explorer 11. Followed your link. Then the Demo works, and I can interact with it.
Beta? It very much seems so.