
Hiding in
Pla in Sigh t
SEND SECRET MESSAGES INVISIBLY OVER LIGHT
WAVES WITH YOUR OWN OPTICAL COVERT CHANNEL
The art of spycraft often requires using clever
methods to send secret messages. This can be
done with invisible ink, ciphers, dead drops, and
even light!
This project is your entry into covert channels
and the world of optical communications. You’ll
incorporate a secret message into an LED
transmitter that will be undetectable by the
human eye. Then,you’ll build a receiver that will
decode the message!
The transmitter can be built easily on a
breadboard without soldering; the receiver
requires basic soldering of through-hole
components. ...