Global Security Watch > Decoding the hidden ID tracker in your printer output

http://www.hojohnlee.com/weblog [Ho John Lee’s Weblog] Now EFF has decoded the information-hiding scheme on the Xerox Docucolor series, by getting EFF supporters to print out pages from their printers and mail them to our researchers, who examined them under magnification and special light and cracked the code.

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Freedom-to-tinker.com[Freedom-to-tinker.com] Freedom to Tinker » Blog Archive » EFF Researchers Decode Hidden ...: This could have been prevented by using cryptography, to make marks that can only be decoded by the Secret Service, and that don’t allow anyone but the secret service to detect whether two documents came from the same printer. This would have added some complexity to the scheme, but that seems like a good tradeoff in a system that was supposed to stay secret for a while.

Eff.orghttp://www.eff.org [Eff.org] EFF: Breaking News: EFF and its partners began its project to break the printer code with the Xerox DocuColor line. Researchers Schoen, EFF intern Robert Lee, and volunteers Patrick Murphy and Joel Alwen compared dots from test pages sent in by EFF supporters, noting similarities and differences in their arrangement, and then found a simple way to read the pattern.

Bloglines.comhttp://www.bloglines.com [Bloglines.com] Bloglines | Citations: EFF的页面上还提供了一个简单的检验程序，如果有条件把自己的打印纸上的点排布读出，可以输入到这里，解码出来看看包含了什么信息。 不知道对其他牌子的机器有用没有。 EFF 官方 http://www.eff.org/Privacy/printers/docucolor/ Technorati : Decode , EFF , Printer , Xerox

Privacydigest.comhttp://www.privacydigest.com [Privacydigest.com] Privacy Digest: Privacy News (Civil Rights, Encryption, Free ...: EFF and its partners began its project to break the printer code with the Xerox DocuColor line. Researchers Schoen, EFF intern Robert Lee, and volunteers Patrick Murphy and Joel Alwen compared dots from test pages sent in by EFF supporters, noting similarities and differences in their arrangement, and then found a simple way to read the pattern.

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