http://uwcryspionvholmkfxoqt2xns5mvnct34ytacugxtqpqrnka2oqm6kqd.onion/software/DKG/intro.html
In essence, an (n,t)-DKG protocol
allows a set of n nodes to collectively generate a secret with its shares spread over the nodes such that any subset of size
greater than a threshold t can reveal or use the shared secret,
while smaller subsets do not have any knowledge about it.