[16332] in cryptography@c2.net mail archive
Re: Printers betray document secrets
daemon@ATHENA.MIT.EDU (Rich Salz)
Fri Oct 22 00:42:40 2004
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Thu, 21 Oct 2004 12:27:50 -0400 (EDT)
From: Rich Salz <rsalz@datapower.com>
To: Ian Grigg <iang@systemics.com>
Cc: "R.A. Hettinga" <rah@shipwright.com>,
"cryptography@metzdowd.com" <cryptography@metzdowd.com>
In-Reply-To: <417575BA.8090205@systemics.com>
> > US scientists have discovered that every desktop printer has a signature
> > style that it invisibly leaves on all the documents it produces.
>
> I don't think this is new - I'm pretty sure it was
> published about 6 or 7 years back as a technique.
A couple of years ago, I was told that *every* Canon laser engine
generated a unique microprint signature that could be traced back to a
particular device. OEMs could buy the engine with or without the
signature. If so, this has been going on, surruptitiously, for years.
/r$
--
Rich Salz Chief Security Architect
DataPower Technology http://www.datapower.com
XS40 XML Security Gateway http://www.datapower.com/products/xs40.html
XML Security Overview http://www.datapower.com/xmldev/xmlsecurity.html
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