Wednesday, October 19, 2005

By Your Dots They Shall Know You

A research team led by the Electronic Frontier Foundation (EFF) recently broke the code behind tiny date, time, and serial number identifying dots printers and copiers secretly hide in documents. The U.S. Secret Service admitted that the tracking information is part of a deal struck with manufacturers. The EFF story is at this link. They list results for tested printers and copiers here and seek samples from others for further investigation. The patterns are visible under blue laser light using a microscope. EFF tells here how to spot the pattern and understand the coding as well as offering a program which can be either downloaded or used online to reveal the encoded information.

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