With the token of the legitimate user in hand, the attacker can proceed to act as the user in interaction with the site, thus to impersonate the user.
Are there any particular kinds of attacks you're worried about, such as attackers impersonating legitimate users?
Distributed Denial of Service, which depletes the network's resource and denies service to legitimate users, is one of the hardest security problems in the Internet.
Collage also aims to mimic the traffic patterns of legitimate users, so that digital fingerprints which may suggest illicit behaviour are not produced.
