Privacy-Preserving Federated Data Sharing

Ferdinando Fioretto, Pascal Van Hentenryck

Abstract: Consider a set of agents with sensitive datasets who are interested in the same prediction task and would like to share their datasets without revealing private information. For instance, the agents may be medical centers with their own historical databases and the task may be the diagnosis of a rare form of a disease. This paper investigates whether sharing privacy-preserving versions of these datasets may improve the agent predictions. It proposes a Privacy-preserving Federated Data Sharing (PFDS) protocol that each agent can run locally to produce a privacy-preserving version of its original dataset. The PFDS protocol is evaluated on several standard prediction tasks and experimental results demonstrate the potential of sharing privacy- preserving datasets to produce accurate predictors.