Building Reputations for Internet Clients

We propose a design of a client reputation system that can be used to reduce unwanted traffic in the Internet. Many reputation systems proposed in the trust literature are provider-oriented, but because of different use and adversary models, their techniques are not directly applicable to client reputation systems. We survey the challenges of building client reputations, discuss two different approaches to information collection — a reporter and a monitor model — and propose their combination that successfully handles major threats to reputation validity.