In Bon Kyu Bon you have a big help in the field of stenography. It is a very simple program to make the job of writing hidden messages easier, in a way that only the receiver will know of their existence (not just their content).
Stenography is a security practice that contrasts with cryptography, which hides the content, not the existence of a message. But Bon Kyu Bon also uses cryptography to cypher a text, concretely a 256-bit Rijndael or AES algorithm.
NOTE: For Bon Kyu Bon to work correctly, it needs
Microsoft .NET Framework installed on your PC.