Education Technology

NUMB3RS - Season 3 - "The Mole" - Coded Messages

Published on 10/17/2008

Activity Overview

Students will study a process called steganography, in which hidden messages can be coded into pictures. A picture viewed on a computer screen is made up of a series of thousands of dots and bytes, and not every single byte is needed to make the picture. A coded message can easily be hidden in the unused parts of the image.

Before the Activity

Download the attached PDF and look over the Teacher Page.

During the Activity

Discuss the materials from the Student Page with your class.

After the Activity

Encourage students to explore web sites and questions from the Extensions page.