[rohrpost] BPjM blacklist reversed

[Geert Lovink]

> From: Eugen Leitl <eugen at leitl.org>
> Subject: BPjM blacklist reversed
> Date: 9 July 2014 2:23:28 PM GMT+02:00
> To: cypherpunks at cpunks.org
> 
> https://bpjmleak.neocities.org/
> 
> tl;dr: Germany has a censorship federal agency called BPjM which maintains a
> secret list of about 3000 URLs. To keep the list secret it is distributed in
> the form of md5 or sha1 hashes as the "BPJM-Modul". They think this is safe.
> This leak explains in detail that it is in fact very easy to extract the
> hashed censorship list from home routers or child protection software and
> calculate the cleartext entries. It provides a first analysis of the
> sometimes absurd entries on such a governmental Internet censorship list.