Lock the printer print and the time to disclose your privacy
Today, you use the laser Printer It? What materials are printed? In response to other questions, you can lie, but the printer will print the truth word for word mark paper. This is not fiction but a fact. In recent years, falling prices of laser printers, inkjet printers, compared with the traditional, many advantages of it are more and more enterprises and individual users alike. However, the laser printer may disclose the user's privacy.
7 dated 14 "USA Today" newspaper as "printer out of privacy concerns raised dots" as a theme, reported deep in the mystery of laser printers (ink jet printer there is no such problem). Report said: "Protection of the leading electronic privacy organizations?? Electronic Frontier Foundation, believes that more and more manufacturers of laser printers, with a printed page can be left in the yellow dots of technology, through which kinds of small points can trace the serial number of the printer, print the identity of the ultimate recognition. "
With lawsuits birth "rights righteous"
Electronic Frontier Foundation (EFF) IT industry in the United States has "rights righteous" nickname. It is the non-profit non-governmental organization, was established in July 1990 in San Francisco, marked by the blue ribbon. EFF on the official website describes its purpose: "In the context of today's digital age, efforts to safeguard the First Amendment gives freedom of expression, in technology-related civil liberties issues, on the Press, decision makers and public education, to play the protector of civil liberties. "as the World Intellectual Property Organization authorized observers, EFF has members in Canada, Toronto, Washington and Brussels, Belgium and other places. Economic sources, EFF rely mainly on donations.
EFF is closely related to the establishment and one case. March 1990, the Federal Secret Service hacker sentenced to capture the name of Steve Austin, Texas? Jackson Games (the famous role-playing game company) search and seizure of the company. Federal Secret Service's reckless law enforcement, Jackson stirred a large number of sympathizers dissatisfied with game companies, they organize themselves and the federal Secret Service lawsuit. 3 years later, the Federal Court ruled that "the Federal Secret Service would be improper to compensate Jackson Games 300 thousand U.S. dollars." During the proceedings together a group of lawyers, volunteers and technical experts, self-established EFF, their purpose is to address the increasing popularity of computer and communication tools caused by social conflict.
Small yellow is the source of leaks
2005 7 , EFF posted on the website entitled "color laser printer ID technical investigation," the article, first pointed out that many manufacturers of laser printer products, "left hand", the printer's serial , and other information secret tag to print the page. In analyzing the motives and consequences of this approach when, EFF pointed out that if the technology used improperly, the consequences are serious, the department can interpret marks, find the serial number and manufacturer of the printer, and then check the printer manufacturer buyers . "The Government is a complete user data, may use the information for any purpose", which undoubtedly would violate the privacy of American citizens.
Although the federal Secret Service spokesman said that these technologies and measures just to crack down on counterfeit notes were made, but the EFF that color laser printers often used anonymous print, is an important tool for exercising the right to freedom of expression. Mark in front of laser printer output, long-term protection of the citizens of expression at risk. EFF further pointed out that from the early 90s of last century, Secret Service and laser printer manufacturers to develop this technology, which markers may only be frank do not want the U.S. government in a number of technical means, therefore, the general consumption should pay attention to this potential risk.
EFF page on the color laser printer output on a technical analysis of markers. With blue LED (light emitting diode) light and a magnifying glass, everyone can observe the marker. Xerox printer's output to the page, for example, marked by the 0.5 × 1 inch square, a small yellow spot within the composition. EFF has prepared a simple Linux script and C language program to analyze these small yellow dot in the alignment of the position will be a bit set to 1, the blank position set to 0, then the representative of the two hexadecimal values converted into 16 system of values, draw the number 15. EFF found that this set of figures is hard to understand, so that "such information may be encrypted, and the analysis process is gaining traction; including printer model we get more information, including, we can understand this encoding technology."
Mark as soon as possible to decrypt coded, EFF to "fully mobilize the masses" approach, the site offers eight PDF documents, to mobilize supporters "into the neighborhood store laser printers, this 8 File Print and mail to us, attach a printer models and other information. "Extensive collection of print samples on the basis of, EFF released a report soon.
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