so if you type out a threatening letter that you wish to remain anonymous, use a type writer? Hehehe
Reminds me of that serial killer who sent a floppy disk to the police to brag about not being caught, but the floppy had meta data on it that told police where the files was made.
Mechanical typewriters have their own form of watermarking, albeit unintentionally. Slight differences in manufacturing and wear introduces measurable differences into the typewritten page.
It's how the FBI was able to link the Unabomber's "manifesto" to one of the typewriters found in his cabin:
I wrote a post about this:
https://thedonald.win/p/11QRasD4rQ/-the-source-of-suspect-pristine-/
TL;DR: modern laser printers and copiers add a digital watermark to every page that is printed:
https://en.wikipedia.org/wiki/Machine_Identification_Code
It might be possible to identify the origin of these suspicious ballots, or at least confirm they are all from the same source.
so if you type out a threatening letter that you wish to remain anonymous, use a type writer? Hehehe Reminds me of that serial killer who sent a floppy disk to the police to brag about not being caught, but the floppy had meta data on it that told police where the files was made.
Mechanical typewriters have their own form of watermarking, albeit unintentionally. Slight differences in manufacturing and wear introduces measurable differences into the typewritten page.
It's how the FBI was able to link the Unabomber's "manifesto" to one of the typewriters found in his cabin:
https://archives.fbi.gov/archives/about-us/lab/forensic-science-communications/fsc/april2001/held.htm