[D] Big differences between swarm learning and federated learning

A fairly new paper in Nature (https://www.nature.com/articles/s41586-021-03583-3) in 2021 introduces a new framework that can deal with decentralized data called swarm learning. They said that the biggest innovation of swarm learning is that there is no central node that aggregates the data. However, according to their supplementary, at the time when they "share the learning from the individual models, one of the swarm nodes is dynamically elected as a leader...the elected leader node collects the model parameters from …

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