Won attack X break Freenets anonymity? Short answer: Probably yes.
Long answer: Freenet does not offer true anonymity in the way that Tor and the Mixmaster cypherpunk remailers do. Most of the non-trivial attacks (advanced traffic analysis, compromising any given majority of the nodes, etc.) that these were designed to counter would probably be successful in identifying someone making requests on Freenet. Your identity is always visible to the nodes you are actually connected to. They know what keys your node requests: your anonymity against them is a limited level of plausible deniability, that maybe you are forwarding these requests for some other node. Unfortunately, your peers can do correlation attacks to figure out which requests are from you and which requests are from your peers or somebody else. These attacks rely on the attacker knowing what the keys are for, and there being lots of them, so for example, a big splitfile, a big freesite inserted regularly, a Frost poster maybe who uploads files too.
