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:
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