Here is a copy of this post describing the attack:
This article was posted to r/freenet with the title "Successful Freenet
Attack Results in Arrest."  I don’t yet know where we can find the court
filings but I’m very curious to see more details.
I’ll copy my comment from Reddit on this, which includes some quotes: 
Interesting! This looks like the only attack I could think of short of
some way to break Freenet wide open, which is encouraging I guess. They
built a list of keys/blocks that contain illegal content, then tracked
requests for them:
Essentially, the BCI planted its own computers within the Freenet
network, according to an affidavit written by BCI Agent Jesse Smith.
Their computers kept logs of certain Freenet users' IP addresses and
the codes for what they were downloading, according to the affidavit.
Agents then compared the codes with a database they built of codes
known to be child porn.
The difficulty lies with telling who ultimately downloaded the child
porn because Freenet routes traffic through multiple computers on the
But BCI investigators were able to devise a way to tell which IP
address--and consequently, which Freenet user--ultimately was
downloading the offending files.
I’m glad they found difficulty there, as designed. I wonder if we can
find any details on what this “way to tell” is. It’s the critical and
therefore really interesting part. Is this MAST? Sybil? Something more
advanced? Did they convince people to be surrounded by LEA darknet
nodes? Maybe it’s just some variant on "opennet is broken, to no one’s
When investigators carried out a search warrant earlier this month of
UND police officer Meagher’s apartment in the 1500 block of Eighth
Avenue South, they found his laptop in the process of downloading
images off Freenet, according to court papers.
Officers did a preview of his computer and found 10 images or videos
of girls between the ages of 4 and 9 years old being sexually
assaulted by adults, according to court records.
Yeesh. Glad they caught this person!
0 http://www.thedickinsonpress.com/news/north-dakot ... edators-police-online-struggle
1 https://www.reddit.com/r/Freenet/comments/3ti8c9/ ... enet_attack_results_in_arrest/
Источник: http://127.0.0.1:8888/freenet:USK@oGoFy3TLGk0EGBy ... AE/WARNING_security_freenet/3/