I have no idea - all I know is that I've known this fact for so long I can't remember when or where I heard about it. It's on the wikipedia page for "computer printers" for pete's sake - maybe you can search the change logs to see who added it and when. There's even a page called "printer steganography" that references a PC World article from 2004.
Actually, I can remember where I was working at one point when I had a discussion of this trivia, so that would have been between April-December 2001.
Just because YOU didn't know about this, doesn't mean it is a secret. I have nothing to do with the printer industry and I've known about it for many years. It seems to be pretty common knowledge, at least around moderately technical types. I wouldn't doubt that it's been used in a CSI episode or similar.
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I have no idea - all I know is that I've known this fact for so long I can't remember when or where I heard about it. It's on the wikipedia page for "computer printers" for pete's sake - maybe you can search the change logs to see who added it and when. There's even a page called "printer steganography" that references a PC World article from 2004. Actually, I can remember where I was working at one point when I had a discussion of this trivia, so that would have been between April-December 2001.
Just because YOU didn't know about this, doesn't mean it is a secret. I have nothing to do with the printer industry and I've known about it for many years. It seems to be pretty common knowledge, at least around moderately technical types. I wouldn't doubt that it's been used in a CSI episode or similar.