What problem is UTU solving?

In any online marketplace, establishing trust between parties who would like to engage in business with each other is a prerequisite for that business to actually happen.
But the current trust and reputation mechanisms such as anonymous star ratings and reviews are often flawed and easily manipulated. Consider, for instance, the fake restaurant that reached #1 on TripAdvisor London and widespread review fraud on Amazon.
Read more about this problem in our Lightpaper.