There is a cryptographic subfield called secure multiparty computation that lets you compute something like this (an average where nobody finds out the inputs o

There is a cryptographic subfield called secure multiparty computation that lets you compute something like this (an average where nobody finds out the inputs of others) - https://cs.stanford.edu/people/eroberts/courses/soco/projects/2004-05/cryptography/smc.html https://cs.stanford.edu/people/eroberts/courses/soco/project...