> > 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 --------------------------------------------------------------------- The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography" to [EMAIL PROTECTED]