Episode 15: Ninja Communication

Since ninja were engaged in espionage, they had to gather information and accurately convey it without anyone knowing. Typical means of information transmission included smoke signals, a cipher using knots in a rope, and special methods of transporting secret messages. But in the second half of the episode, we'll look at their ultimate method of concealing information: invisible ink! Find out how they did this, and follow Chris as he makes his own secret message with ninja techniques.

Rope could not only be used to capture an enemy, but convey information to fellow ninja. How was this done?
A ninja carrying a secret message has been spotted at a checkpoint! But where is he hiding it?
This may look like just a piece of white paper, but it actually represents the ninja's ultimate technique for transmitting information!