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Creating a Simple Shift Substitution Ciphertext

Below is an applet which allows you to create, from a specified plaintext, a ciphertext based on a simple shift substitution cipher.  Just click on its Start button to bring up the applet's frame:

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To create ciphertext, type your plaintext message in the upper text area, select the shift you desire in the combo box, and click the Translate button.  The resulting ciphertext will appear in the lower text area.