Dear Fedi,
Please find me a case, where there is a federated database. The data should be kept private for each company/participant, but all of them should be able to access the data and for example conduct research with it, without being able to pinpoint back to the original data&its owner. Technically this should be doable with a federated system.
Do you know if such system exists? Let me know, from any field and from anywhere in the world.