![Reality Winner was outed by invisible dot patterns added by printers (among other things) | Boing Boing Reality Winner was outed by invisible dot patterns added by printers (among other things) | Boing Boing](https://i0.wp.com/boingboing.net/wp-content/uploads/2017/06/Screenshot-2017-06-05-21.50.07.png?fit=684%2C523&ssl=1)
Reality Winner was outed by invisible dot patterns added by printers (among other things) | Boing Boing
![Investigating Machine Identification Code Technology in Color Laser Printers | Electronic Frontier Foundation Investigating Machine Identification Code Technology in Color Laser Printers | Electronic Frontier Foundation](https://www.eff.org/files/test00-template.png)
Investigating Machine Identification Code Technology in Color Laser Printers | Electronic Frontier Foundation
![The Hacker News on Twitter: "Here's How Secret "Yellow Dots" on Classified Documents Helped #FBI to Identify NSA Leaker, @ErrataRob Explained https://t.co/pc1horqtfi https://t.co/OmwVqh1T0W" / Twitter The Hacker News on Twitter: "Here's How Secret "Yellow Dots" on Classified Documents Helped #FBI to Identify NSA Leaker, @ErrataRob Explained https://t.co/pc1horqtfi https://t.co/OmwVqh1T0W" / Twitter](https://pbs.twimg.com/media/DBo4ibRUQAAAjeT.jpg)
The Hacker News on Twitter: "Here's How Secret "Yellow Dots" on Classified Documents Helped #FBI to Identify NSA Leaker, @ErrataRob Explained https://t.co/pc1horqtfi https://t.co/OmwVqh1T0W" / Twitter
![Investigating Machine Identification Code Technology in Color Laser Printers | Electronic Frontier Foundation Investigating Machine Identification Code Technology in Color Laser Printers | Electronic Frontier Foundation](https://www.eff.org/files/test02-eff_blue.png)