Usas una LASER COLOR, el FBI te espia...!

Hace algunos años que leí una información similar. Algunas impresoras dejan una "firma" en cada hoja que imprimen. En caso de la investigación de delitos esto puede ayudar a saber donde se vendió la impresora que originó el documento y así llegar al propietario.

De más está decir que las organizaciones delictivas y/o terroristas compran impresoras usadas o robadas para no figurar como propietarios de dicha máquinas

Muy buena información .

Muy intersante la informacion supercuerda
eso es algo que ni siquiera me lo imagine, se va a llevar mas control contra la falsicacion del dinero, me imagino que un mafioso puede hacerse millonario falsificando dinero pero si lo atrapan las consecuencias seran muy graves.

El punto importante, no es tan solo la identificacion del equipo, sino que pueden identificar TODO lo que salio de el, es una form ademasiado importante de entrometerse en la privacidad, y esta no es la unica muestra.
Si piensan durante un instante que los microprocesadores estan "SERIADOS" y que esa serie puede ser identificada por Internet, sabran que es algo asi como decir tu nombre y apellido cuando te conectas, si a eso le suman que las impresoras "FIRMAN" cada papel que imprimen, ya la intromision es total.
Envias una carta a tu novia, imprimis una nota periodistica, haces una "QUEJA" anonima por cualquier cuestion y "TU" firma ESTA AHI.

Este es solo el comienzo, las grandes potencias, desean utilizar y aprovechar el consumo masivo de la tecnologia (lo mas lindo es que esto lo descubrieron los rusos) para insertarte un chip en el Qlo, "Electronic Frontier Foundation" es una ONG que lucha por las libertades individuales de TODOS los que estamos aqui, intenta defender la privacidad de TODOS en general, para que no llegue el momento en que si te compras una licuadora sepan con que desayunaste.

Puede parecer exagerado, pero no lo es, si desean mas informacion y detalle sobre como hallar estos codigos en cada tipo de impresora, solo consulten.

Que tiene que ver la laser color con que el FBI te espia???
JAjajajajajaJAJAJAjajA
que titulo paranoico para una verdad a medias..

El hecho de que el dispositivo imprima de una forma especifica ayuda a catalogar los documentos que se procesan como evidencia forense a futuro.. Esto no es ni un Pro ni un Contra.. A menos claro que se dedique la herramienta para fines delictivos.. ahi si seria una contra.. para el delincuente claro..

En algunos lugares donde uno va a comprar, tienen detectadores de billetes para ver si no son falsos.

DocuColor Tracking Dot Decoding Guide

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This guide is part of the Machine Identification Code Technology project. It explains how to read the date, time, and printer serial number from forensic tracking codes in a Xerox DocuColor color laser printout. This information is the result of research by Robert Lee, Seth Schoen, Patrick Murphy, Joel Alwen, and Andrew "bunnie" Huang. We acknowledge the assistance of EFF supporters who have contributed sample printouts to give us material to study. We are still looking for help in this research; we are asking the public to submit test sheets or join the printers mailing list to participate in our reverse engineering efforts.
The DocuColor series prints a rectangular grid of 15 by 8 miniscule yellow dots on every color page. The same grid is printed repeatedly over the entire page, but the repetitions of the grid are offset slightly from one another so that each grid is separated from the others. The grid is printed parallel to the edges of the page, and the offset of the grid from the edges of the page seems to vary. These dots encode up to 14 7-bit bytes of tracking information, plus row and column parity for error correction. Typically, about four of these bytes were unused (depending on printer model), giving 10 bytes of useful data. Below, we explain how to extract serial number, date, and time from these dots. Following the explanation, we implement the decoding process in an interactive computer program.
Because of their limited contrast with the background, the forensic dots are not usually visible to the naked eye under white light. They can be made visible by magnification (using a magnifying glass or microscope), or by illuminating the page with blue instead of white light. Pure blue light causes the yellow dots to appear black. It can be helpful to use magnification together with illumination under blue light, although most individuals with good vision will be able to see the dots distinctly using either technique by itself.
This is an image of the dot grid produced by a Xerox DocuColor 12, magnified 10x and photographed by a Digital Blue QX5 computer microscope under white light. While yellow dots are visible, they are very hard to see. We will need to use a different technique in order to get a better view.

This is an image of a portion of the dot grid under 60x magnification. Now the dots are easy to see, but their overall structure is hard to discern because the microscope field only includes a few dots at a time.

This is an image of one repetition of the dot grid from the same Xerox DocuColor 12 page, magnified 10x and photographed by the QX5 microscope under illumination from a Photon blue LED flashlight. Note that the increased contrast under blue light allows us to see the entire dot pattern clearly.

The illumination is from the lower right; to the upper and lower left of the image, the corners of another repetition of the dot grid are visible.
Here, we use computer graphics software to overlay the black dots in the microscope image with larger yellow dots for greater visibility. (Because these computer-generated dots are significantly larger than the original dots, this image is no longer to scale and is now a schematic representation of the relative position of the dots.)

Finally, we add explanatory text to show the significance of the dots.

The topmost row and leftmost column are a parity row and column for error correction. They help verify that the forensic information has been read accurately (and, if a single dot has been read incorrectly, to identify the location of the error). The rows and columns all have odd parity: that is, every column contains an odd number of dots, and every row (except the topmost row) contains an odd number of dots. If any row or column appears to contain an even number of dots, it has been read incorrectly.
Each column is read top-to-bottom as a single byte of seven bits (omitting the first parity bit); the bytes are then read right-to-left. The columns (which we have chosen to number from left to right) have the following meanings:

• 15: unknown (often zero; constant for each individual printer; may convey some non-user-visible fact about the printer's model or configuration)
• 14, 13, 12, 11: printer serial number in binary-coded-decimal, two digits per byte (constant for each individual printer; see below)
• 10: separator (typically all ones; does not appear to code information)
• 9: unused
• 8: year that page was printed (without century; 2005 is coded as 5)
• 7: month that page was printed
• 6: day that page was printed
• 5: hour that page was printed (may be UTC time zone, or may be set inaccurately within printer)
• 4, 3: unused
• 2: minute that page was printed
• 1: row parity bit (set to guarantee an odd number of dots present per row)

The printer serial number is a decimal number of six or eight digits; these digits are coded two at a time in columns 14, 13, 12, and 11 (or possibly just 13, 12, and 11); for instance, the serial number 00654321 would be coded with column values 00, 65, 43, and 21.