There are many different tools and algorithms used to hide secrets in other documents. Unfortunately, not all of them are open and documented. But this doesn't seem to harm the reputation of Windows only tools like Stegano.Net in the context of recreational activities like Geocaching. The overview about the principle of this specific software should allow the user to extract its previously stored data without depending on closed software and make it possible for the interested reader to decide whether this is really such a good "privacy" tool.