Global Security Watch > Xerox DocuColor tracking dots decoded
[The Pathedral and the Kazoo] asked the EFF after PC World published an article stating that "several printer companies quietly encode the serial number and the manufacturing code of their color laser printers and color copiers on every document those machines produce. The EFF received many printer test sheets from around the world and recently managed to decode the matrix of tiny yellow dots that appears repeatedly on about every inch of your printout.
Some related posts from Technorati and Google.
[WLF | May it Please the Court Law Weblog of legal news and observations, including a quote of the day and daily updates] Where, Oh Where Has Our Privacy Gone?: They've cracked a code of practically invisible yellow dots applied to paper printed on color printers. The code was created by government and printer manufacturers and designed to thwart counterfeiters.
[The Neoteric] Easily tracked and traced: In her new book "Spychips", privacy activist Katherine Albrecht warns of efforts to embed digital trackers into every item we buy. Perhaps we should worry more about all the tracking devices we already own - the cellphones with locator chips, the unique codes being broadcast by every wireless Internet router, and of course the paper scrolling out of your color laser printer, with your signature on every page, like it or not.
[Independent Publishing News, e-Marketing Articles, Online Collaboration Reviews by Robin Good] Printers and Privacy: Identity Tracking Via Laser Printouts: Printers and Privacy: Identity Tracking Via Laser Printouts Color printers leave a technical... counterfeiters, but is also a troubling notion for privacy advocates weary of big brother.
[Eff.org] EFF: Breaking News: "Underground democracy movements that produce political or religious pamphlets and flyers, like the Russian samizdat of the 1980s, will always need the anonymity of simple paper documents, but this technology makes it easier for governments to find dissenters," said EFF Senior Staff Attorney Lee Tien. "Even worse, it shows how the government and private industry make backroom deals to weaken our privacy by compromising everyday equipment like printers.
[Freedom-to-tinker.com] Freedom to Tinker » Blog Archive » EFF Researchers Decode Hidden ...: The marks from Xerox DocuColor printers are encoded in an array of very small yellow dots that appear all over the page. The dots encode the date and time when the page was printed, along with what appears to be a serial number for the printer.
[Computerworld.com] Color printers' little yellow secret (and Picture Bork ...: » Pbrla Beach Blogger: "Consumer privacy advocates at EFF, however, counter that people under the rule of 'repressive governments or those who have a legitimate need for privacy' could be threatened by the secret encoding program. One pointed out that 'after months collecting samples from printers around the world' it took an intern only 'about a week' to break the code."
[Government.zdnet.com] Color printers include back door for Secret Service | ZDNet ...: You can see the dots on color prints from machines made by Xerox, Canon, and other manufacturers (for a list of the printers we investigated so far, see: http://www.eff.org/Privacy/printers/list.php). The dots are yellow, less than one millimeter in diameter, and are typically repeated over each page of a document.
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