A well known mathematical problem begins with a group of millionaires meeting over lunch (clearly a pre-COVID scenario). The group has a wonderful time, enjoying their food and drinks wholeheartedly. As they ask for the bill, one particularly cheeky member of the group proposes that the richest among them pay the bill. The group agrees, but immediately finds itself at an impasse over the bill. No one wants to share their exact wealth.
This scenario, called the Millionaires' problem, was first proposed in 1982 by computer scientist and computational theorist Andrew Yao. It is a secure multi-party computation. . .