Pixel Knot? Yes it is one of many tools for exchanging secret information. Steghide is another….there are many. Wav and mp4 files etc… The key thing that Q did state is "'tools' All of these tools work together to find the surveillance challenges'' and hidden information etc…
Its really no different from digging in the web. All anons are actually wired for this type of forensic work. By our very observation, autism OCD, ADD nature.
Ghidra can do many things. It can decode many files types, different platforms, chip sets, controllers. Its a primary tool for decoding executable files, and code with internal functions. I have dug into images, PDFs and other file types. Just to look and see whats going on from a particular angle. With a similar tool I will look again from another angle. Its one of many tools that can be utilized. It is however extremely powerful. The thing is… we need all the tools we can get as we identify the security holes in most of the products we use every day. Phones / PCs, CPUs, routers, chip sets, software and apps. China has produced almost everything tech in the US and guess who we are in a silent war with right now…. It will take an army of anons to dig into the compromised digital universe. I encourage every anon out there with skills or no skills to start digging into our technology.