utln Posted October 18, 2005 Share Posted October 18, 2005 The top and left rows are used as parity bits, for error correction. The remaining dots in the grid are used to convey information about the document and its source, including printer model, printer configuration, printer serial number, and the date and time the page was printed.http://arstechnica.com/news.ars/post/20051018-5447.html Link to comment Share on other sites More sharing options...
DigeratiPrime Posted October 18, 2005 Share Posted October 18, 2005 (edited) incredible. remember reading about this on slashdot a while ago. gj EFF!http://www.eff.org/Privacy/printers/docucolor/ Edited October 18, 2005 by DigeratiPrime Link to comment Share on other sites More sharing options...
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