Sophisticated and efficient steganographic schemes with images as cover are available. However, I wonder: are there any that use texts as cover instead?
If one could only transfer a few printable natural language texts due to constraints, using texts as the cover might be useful.
Does anyone know of such a scheme or how to design one? I want the steganographic bits to cover text bits in no less than a ratio of 1/50. The scheme should be user-friendly and easy to implement.
[Addendum 1, edited] I have created a scheme named WORDLISTTEXTSTEGANOGRAPHY. It should work, being in the range of [0.5, 1.0] bit per word of natural language text. In it, the user must do some trial and error under the guidance of the software. (E.g., using an appropriate codebook could highly compress the input steganographic sequence.) The latest version, 2.1, runs on Python V.3.6.1.