From tedks@riseup.net Fri Jul 6 02:38:45 2018 From: Ted Smith To: cypherpunks-legacy@lists.cpunks.org Subject: Re: [liberationtech] Removing watermarks from pdfs (pdfparanoia) Date: Fri, 06 Jul 2018 02:38:45 +0000 Message-ID: <172289281171.3881296.4993410482211573922.generated@mail.pglaf.org> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2957202560504378672==" --===============2957202560504378672== Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit On Wed, 2013-02-06 at 08:48 +0100, Eugen Leitl wrote: > I get PDFs watermarked to me by their placement of sections in > relation > to one another, their word choice in opening sentences of paragraphs, > and figure/image locations within the PDF. The idea being that the > content is the watermark, not some silly overlay watermark which is > fairly easily stripped out in most free operating systems. Whoa. Permuting word choice in opening sentences seems like a way more resource intensive way of doing things than most journal publishers could do -- especially since the source materials are a mix of Word and latex. I wonder if this is because Andrew gets PDFs from government agency-type places, as a Tor Project staff member. This is scary from a leaker's perspective -- you'd have to get two (or more) different copies of any given watermarked document and merge them in some way to obfuscate the original source. -- Sent from Ubuntu ----- End forwarded message ----- -- Eugen* Leitl leitl http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE --===============2957202560504378672==--