When I frist read about the famous dining cryptographers problem, in a book years ago I remember the author made a twist on it, demonstrating the generalization of the problem.
Basically the dining cryptographers wanted to know who has the best income. But since they all worked for secret agencies, they were not allowed to tell each other. So they had a system where they would write their income down in some order without giving away information to their sitting neighbors on what their income is. I'm unable to recall the way that system worked and I can't remember what book it was.
I was hoping somebody recalls this twist on the problem or the book.