A number of color laser printers leave coded metadata in the form of extremely small, hard to discover, yellow dots.

The dots contain information related to the printers serial number and network connection. They can be used to trace a printed document to its source.

Many people think that if they write a physical letter anonymously to the government, corporations and the police, that they will remain hidden, but in fact the printer is leading them right to you.

Possible ways to detect them:

  • A blue LED light
  • A powerful magnifier
  • A high-resolution scanner
  • An image processing program
  • UV-light

The dot patterns can also help to restore shredded documents.

Your privacy was lost a long time ago

Join the conversation! 5 Comments

  1. That’s why I cut and paste my threatening letters from magazines.

    Liked by 1 person

    Reply
  2. Big brother is forever seeking new ways to erode what little freedom we possess!

    Liked by 2 people

    Reply
    • You Stated — “Big brother is forever seeking new ways to erode what little freedom we possess!”

      My Response — or……. freedom is an illusion that upsets us every time we see the invisible bars

      Liked by 1 person

      Reply

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Government Secrets

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