Nowadays you can actually see privacy-dependant services test Freenet. To quote research from Bern university who do health data exchange research: “This broker is based on the peer-to-peer network Freenet. This network has been defined to be censorship resistant and to protect the privacy of persons sharing data. This covers the needs for protection expected from a secure data broker.” https://www.igi-global.com/chapter/using-freenet-as-a-broker...