Steganography using WebP

[Mathias Schindler]

In 2023, Katarzyna Koptyra and Marek R. Ogiela published "An Efficient Steganographic Protocol for WebP Files" (https://doi.org/10.3390/app132212404) discussing various methods to embed information in WebP files. I have not seen any published software implementations for the methods described in the paper but I am intrigued about the data-based methods discussed in 2.4, especially 2.4.2 about the prediction modes.

I would be interested to learn if someone has ever implemented it and if, by chance, someone has used the encoder supplied by libwebp to store or extract such added information. 

I understand that such a method might not be robust regards recompression, format conversion etc.

Kind regards,

Mathias