This is rather bizarre story, but, then again, maybe not in this era of skyrocketing paranoia.
According to the Computing Counter Culture Group at the MIT Media Labs, most ink jet printers sold today embed a code in every page you print in the form of a series of yellow dots.
This code, designed by the US Secret Service, includes the serial number, make and model of the device along with the date and time.
All of this is detailed on the Group’s Seeing Yellow web site where they also claim that one person had Secret Service agents come to visit when he ask the printer manufacturer how to turn off the tracking dots.
This is a perfect companion piece to long-standing reports that Photoshop and other image editing software will not allow opening pictures of US currency.
Welcome to the digital age.