Today I learned that many/most color laser printers layer an array of yellow microdots on top of documents 🔬

This Machine Identification Code en.wikipedia.org/wiki/Machine_ encodes a print date and a serial number unique to the machine. It only became public knowledge in 2004, ~20 year after deployment 😑

The Technical University of Dresden released a tool 2 years ago to layer on _even more dots_ to render the MIC unreadable and aid whistleblowers publishing github.com/dfd-tud/deda

Follow

@douginamug
Wow this stuff goes deeper
en.m.wikipedia.org/wiki/EURion
Now I wonder if my printer would let me copy a note - I won't try it though since it is internet connected...

Sign in to participate in the conversation
Mastodon 🔐 privacytools.io

Fast, secure and up-to-date instance. PrivacyTools provides knowledge and tools to protect your privacy against global mass surveillance.

Website: privacytools.io
Matrix Chat: chat.privacytools.io
Support us on OpenCollective, many contributions are tax deductible!