Security Problems

To make the system more useful and increase the amount of traffic we receive, we allow all CoDeeN nodes to act as ``open'' proxies, accepting requests from any client in the world. However, this choice also opens the doors to many security problems. In this section, we discuss some of the problems we encountered during the early development and testing of CoDeeN, and the measures we took to deal with these problems. For the purposes of discussion, we have broadly classified the problems into those dealing with spammers, bandwidth consumption, high request rates, content theft, and anonymity, though we realize that some problems can fall into multiple areas.