Hidden Messages in Tattoos: The Secret History of Steganography 🕵️‍♂️

#Shorts
Tattooing a secret message to your head, that's big brain stuff, and our first recorded use of steganography.

Histiaeus from Greece in 440 BC (Herodotus is the person that recorded the use, oops), used a trusted servant, shaved their head, tattooed a message, then send them on their way after their hair grew back. After the runner arrived, the general shaved his head and read the message.

Steganography is concealing a message within another message or a physical object. In this case a full head of hair, yea I'm a little jealous.

Stego has had a few interesting uses:

HP and Xeros printed barely visible dots on documents, these could be used to track stolen and leaked paperwork.

In 2010 the FBI released a criminal complaint alleging Russian Foreign Intelligence Service used stego software to communicate with "illegal agents."

Stego is also used in hacking challenges though I haven't needed to shave anyone's head yet. Subscribe and hack on.

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