On 12/12/2013 08:41 AM, coderman wrote:
On Wed, Dec 11, 2013 at 9:15 PM, Andy Isaacson <[email protected]> wrote:
... Since the source document appears to be the same
for both, an enterprising DTP jockey could use -clean-1.pdf to tune the
document settings precisely, and then use -project.pdf to search for
better unredaction matches.
i remember seeing software to do this, but for the life of me cannot
find it. anyone?
I only remember this news item from Eurocrypt 2004:
http://cryptome.org/cia-decrypt.htm
Eurocrypt 2004 rump Session,
David Naccache and Claire Whelan,
9/11: Who alerted the CIA? (And Other Secret Secrets)
The basic technique is simple enough, although writing a toolbox that
can accomodate the various fonts, languages etc is probably plenty of work.
my favorite redaction technique is still the Adobe white text on white
background in PDF trick; combine with a filter for CONFIDENTIAL /
PROPRIETARY and you've got a fire hose of informative flotsam...[0]
Yes, for example
https://www.schneier.com/blog/archives/2005/05/pdf_radacting_f.html (the
internet sources cited by Schneier start to detoriate, though).
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