How do I run this applet?

This Java applet requires a Java-capable browser. If you do not see the applet, Java may not be functional in your browser or on your machine.

Object of the activity

This activity allows the user to see how modular arithmetic has been used for years as a means of encoding messages.

Controls and Output

• The textfield at the top of the screen is where you type the text that you want to be encoded:
  

• You specify both the multiplier and the constant below the textfield by entering the appropriate numbers into the textboxes.
  

• After you have entered the text to encode and the multiplier and constant values, you can click the Convert Text, which will display the encoded text in the textfield below the button.