this post was submitted on 20 Oct 2025
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Privacy

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One thing I'm concerned about is recording equipment leaving identifiable information without us knowing about it.

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[–] Core_of_Arden@lemmy.ml 22 points 2 days ago* (last edited 2 days ago) (3 children)

Isn't it common knowledge? I've known about it for at least two decades...

BTW - you can easily work around it. Get someone else to buy your printer for you, or trade with someone who has the same printer... Now, they will still be able to match it to the printer, if they find it at your home, but other that that, you are free...

PS. Don't use your printer to blackmail FBI or CIA. ;-)

[–] TranquilTurbulence@lemmy.zip 18 points 2 days ago (3 children)

Pro tip: If you use a pen and paper to blackmail the FBI and CIA, they can’t trace it back to you using invisible yellow dots.

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[–] Eheran@lemmy.world 13 points 2 days ago (6 children)

There is no connection from a random printer you buy somewhere anonymous to you. They can "only" verify something was (not) printed with that printer.

[–] chloroken@lemmy.ml 5 points 2 days ago

No you don't get it, if you swap paper with your cousin before printing the feds won't have a fucking clue.

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[–] MonkderVierte@lemmy.zip 5 points 2 days ago (1 children)

It's made to trace counterfeit money back.

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[–] Ohh@lemmy.ml 13 points 2 days ago (3 children)

No... But i've thought about how easy it would be to implement in ebooks and pdfs (e.g. my daily newspaper i can download as pdf). I've thought about this when sailing the high seas.

Is it a thing?

[–] Akrenion@slrpnk.net 9 points 2 days ago (1 children)

Watermarking is definitely a thing. Whistle-blower have to think about that as well.

[–] Ohh@lemmy.ml 9 points 1 day ago

Yeah - was motivated to do a search :) https://www.lemonink.co/home#start-using

Most ebooks I bought recently come with a warning that the buyer's data is embedded in the file to deter from sharing it online. TBF it cannot be hard to remove it but I didn't bother to check how it's implemented.

[–] monovergent@lemmy.ml 5 points 1 day ago* (last edited 1 day ago)

It's prevalent among pdfs downloaded from academic publishers (text listing the receiving IP address and/or institution running down the margins). I wouldn't be surprised if it's also done with hidden white text or in the metadata.

[–] grandel@lemmy.ml 6 points 2 days ago* (last edited 2 days ago) (3 children)

~~Ive never noticed this or heard that printers do that.~~

~~Is this maybe specific to the USA?~~

Edit: TIL, thank you!

[–] Core_of_Arden@lemmy.ml 22 points 2 days ago (2 children)

It's not specific to USA... They do it everywhere - with color-printers. Don't know if they do it with B/W printers.

They claim it's to track people who try to print money, but if it were, then they wouldn't really do it on laser printers too...

If you print a photo on a regular paper, and then shine an UV-light on it, you can see it. It's mostly small yellow dots.

[–] grey_maniac@lemmy.ca 10 points 1 day ago (1 children)

There is software you can use that adds all the other dot patterns to essentially anonymize your printer.

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[–] mukt@lemmy.ml 4 points 2 days ago (2 children)

They use yellow ink for that in colour printers.

[–] pirat@lemmy.world 4 points 1 day ago

I just occured to me that could be the reason for when a color printer wont even let you print, say, pure black text, even though it only has emptied some of the colored ink, but still has plenty of black ink left to do the job...

[–] Core_of_Arden@lemmy.ml 2 points 1 day ago (1 children)
[–] mukt@lemmy.ml 0 points 23 hours ago

You wrote more, much; but left this to inference.

I highlighted one bit: yellow.

[–] waldo_was_here@piefed.social 5 points 2 days ago

Its called MIC. Or Machine ident. Code , its all around,

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