- #2015 LASER ALL IN ONE COLOR PRINTER REVIEW HOW TO#
- #2015 LASER ALL IN ONE COLOR PRINTER REVIEW SERIAL NUMBERS#
- #2015 LASER ALL IN ONE COLOR PRINTER REVIEW MANUALS#
We welcome additional statements by manufacturers, resellers, or technicians.
#2015 LASER ALL IN ONE COLOR PRINTER REVIEW MANUALS#
at Druckerchannel) we relied on printer manuals and other manufacturer statements. We looked at printer output under a blue light and/or a computer microscope we consulted press reports about printers (e.g. We have employed three sources of information. In most cases, we are confident that the arrangement of dots is intentional and is intended to track users. In a very few cases, for example, they might be the result of a dithering technique, rather than a forensic mark, or they could be the result of a poorly calibrated printer. Until we decipher the marking schemes or receive other confirmation, this does not constitute proof that any particular kind of information is represented by these dots.
#2015 LASER ALL IN ONE COLOR PRINTER REVIEW HOW TO#
Other forensic marking techniques have been invented, and we do not yet know how to determine whether these techniques are used by a particular printer.)Ī "yes" simply means that we (or another source, as noted) saw yellow dots that appeared anomalous to us. (For example, the HP Color LaserJET 8500 series does not include any yellow tracking dots that we can see, but it may still include some kind of forensic marking, since the majority of other Color LaserJET models do. Limitations of this informationĪ "no" simply means that we couldn't see yellow dots it does not prove that there is no forensic watermarking present. We tried to interpret the information conveyed by these dots as part of our Machine Identification Code Technology Project. This is a list of color laser printer models that do or do not print yellow tracking dots on their output.
#2015 LASER ALL IN ONE COLOR PRINTER REVIEW SERIAL NUMBERS#
THIS ALSO INCLUDES THE PRINTERS THAT ARE LISTED HERE AS NOT PRODUCING YELLOW DOTS.įorensic investigations of the source of documents produced with other printing technologies are also possible, but, as far as we know, printers other than color laser and similar technologies do not deliberately encode their serial numbers in their output. THIS IS TRUE WHETHER OR NOT THOSE CODES ARE VISIBLE TO THE EYE AND WHETHER OR NOT THE PRINTER MODELS ARE LISTED HERE. (Added 2017) REMINDER: IT APPEARS LIKELY THAT ALL RECENT COMMERCIAL COLOR LASER PRINTERS PRINT SOME KIND OF FORENSIC TRACKING CODES, NOT NECESSARILY USING YELLOW DOTS. (If any manufacturer wishes to go on record with a statement to the contrary, we'll be happy to publish that here.) Although we still don't know if this is correct, or how subsequent generations of forensic tracking technologies might work, it is probably safest to assume that all modern color laser printers do include some form of tracking information that associates documents with the printer's serial number. (Added 2015) Some of the documents that we previously received through FOIA suggested that all major manufacturers of color laser printers entered a secret agreement with governments to ensure that the output of those printers is forensically traceable.
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