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Steganography In Printers: Privacy Nightmare |
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This Entry: Date: 2005-08-10 Time: 12:10 Comments: 1 Return To: Recent Entries | |||
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Steganography In Printers: Privacy NightmareSteganography means ‘hidden writing’. It has a long and proud tradition, with ideas dating back to the 1400s and 1500. Steganography is the art of hiding a message so that it can easily be read, but only if you know where and how to look. It doesn’t necessarily have to be an encrypted message (although sometimes it is) it just has to do with hiding it. One example of Steganography is that of an ancient Greek slave who had a message about invasion plans tattooed on his shaven scalp. When the messenger arrived at his destination the message was hidden under his hair, but when the scalp was re-shaved the message became visible. Steganography: hidden writing. You may be surprised to know that Steganography is a feature in many colour printers and photocopiers. It turns out that the US Secret Service has deals with printer manufacturers to print tiny dot patterns which identify the printer used to make the print. That’s right. If you make a colour printout, the serial number of the printer used is encoded right into your lovely colour output. That means that the US government can just read the serial number right off the page, and obtain your name and address from the store that sold you the printer. Think twice before making a colour pamphlet advertising your next political demonstration! Big brother is watching! Props to Chris for forwarding me the URL
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