Printers betray document secrets

[Rich Salz]

> >  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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