Privacy Guides

16544 readers

39 users here now

In the digital age, protecting your personal information might seem like an impossible task. We’re here to help.

This is a community for sharing news about privacy, posting information about cool privacy tools and services, and getting advice about your privacy journey.

You can subscribe to this community from any Kbin or Lemmy instance:

Learn more...

Check out our website at privacyguides.org before asking your questions here. We've tried answering the common questions and recommendations there!

Want to get involved? The website is open-source on GitHub, and your help would be appreciated!

This community is the "official" Privacy Guides community on Lemmy, which can be verified here. Other "Privacy Guides" communities on other Lemmy servers are not moderated by this team or associated with the website.

Moderation Rules:

We prefer posting about open-source software whenever possible.
This is not the place for self-promotion if you are not listed on privacyguides.org. If you want to be listed, make a suggestion on our forum first.
No soliciting engagement: Don't ask for upvotes, follows, etc.
Surveys, Fundraising, and Petitions must be pre-approved by the mod team.
Be civil, no violence, hate speech. Assume people here are posting in good faith.
Don't repost topics which have already been covered here.
News posts must be related to privacy and security, and your post title must match the article headline exactly. Do not editorialize titles, you can post your opinions in the post body or a comment.
Memes/images/video posts that could be summarized as text explanations should not be posted. Infographics and conference talks from reputable sources are acceptable.
No help vampires: This is not a tech support subreddit, don't abuse our community's willingness to help. Questions related to privacy, security or privacy/security related software and their configurations are acceptable.
No misinformation: Extraordinary claims must be matched with evidence.
Do not post about VPNs or cryptocurrencies which are not listed on privacyguides.org. See Rule 2 for info on adding new recommendations to the website.
General guides or software lists are not permitted. Original sources and research about specific topics are allowed as long as they are high quality and factual. We are not providing a platform for poorly-vetted, out-of-date or conflicting recommendations.

Additional Resources:

founded 1 year ago

MODERATORS

jonah@lemmy.jonaharagon.net

271

List of Printers Which Do or Do Not Display Tracking Dots (www.eff.org)

submitted 5 months ago by toaster@slrpnk.net to c/privacyguides@lemmy.one

27 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] tal@lemmy.today 86 points 5 months ago* (last edited 5 months ago)

I wonder whether whether it's possible to render this effectively useless in software by just adding more yellow dots to the image.

Like, can I just cover every non-yellow pixel with a yellow pixel at the same intensity as the tracking dots have? Yeah, maybe it gives my image a faint yellow cast, but...

EDIT: Yup, apparently it is.

https://en.wikipedia.org/wiki/Machine_Identification_Code

Protection of privacy and circumvention edit

Copies or printouts of documents with confidential personal information, for example health care information, account statements, tax declaration or balance sheets, can be traced to the owner of the printer and the inception date of the documents can be revealed. This traceability is unknown to many users and inaccessible, as manufacturers do not publicize the code that produces these patterns. It is unclear which data may be unintentionally passed on with a copy or printout. In particular, there are no mentions of the technique in the support materials of most affected printers. In 2005 the Electronic Frontier Foundation (EFF) sought a decoding method and made available a Python script for analysis.[20]

In 2018, scientists from TU Dresden developed and published a tool to extract and analyze the steganographic codes of a given color printer and subsequently to anonymize prints from that printer. The anonymization works by printing additional yellow dots on top of the Machine Identification Code.[1][2][3] The scientists made the software available to support whistleblowers in their efforts to publicize grievances.[21]

That makes it even more annoying. If printer manufacturers aren't going to defeat that, I'd kind of rather that they not have the yellow dots at all.