Once in a while, the program 'All Things Considered' covers an interesting story. This time they had a story about ink watermarks embedded into a document when you print it. This watermark is used identify the printer or copier that it came from.
Synopsis: "Robert Siegel talks with Purdue University Professor Edward Delp, one of a team who devised a way to watermark pages from copiers and printers. This technology allows for the tracing of documents to specific printers or to a certain model of printer."
This technology is designed to stop counterfeiters which is good, but this still doesn't take away from the privacy implications it has.
"Ultimately, as technology increases, privacy decreases." - me.