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Printers add microscopic yellow dots to track documents.

Crime, courts & justice

Printers add microscopic yellow dots to track documents.

10 min

Hidden within almost every color printout is a secret arrangement of microscopic yellow dots that identify exactly which machine created it. Trace the history of the 'Machine Identification Code' and how it helped the FBI catch high-profile whistleblowers.

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Show notes

Overview of Machine Identification Code (MIC) technology.

The history of the secret agreement between the U.S. Secret Service and printer manufacturers.

Technical breakdown of how yellow dots encode serial numbers and timestamps.

Case study of Reality Winner and the role of printer forensics in her arrest.

Methods for detecting yellow dots using blue light or high-resolution scanning.

In this episode

  1. 1Intro1 min
  2. 2The Invisible Fingerprint2 min
  3. 3The Secret Service Handshake3 min
  4. 4Cracking the Code2 min
  5. 5The Reality Winner Case3 min
  6. 6Outro1 min

Sources

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Printers add microscopic yellow dots to track documents. — Fylom