Vigenere Applet
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Enter plain text or a Vigenere encrypted cipher message in the top Text
Area.
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Enter a key (an English phrase, or random characters) in the second Text
Field.
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Press either the encrypt button or the decrypt button.
Note: This applet will add random characters to the end of your
message, so that your message length is a multiple of the length of the
key. You can use this to generate a random key as follows:
-
Enter a single character in the top Text Area (any character will do).
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Enter n + 1 "a"s in the key field to generate a key with n characters.
For example, if you'd like a key with 6 characters, enter aaaaaaa
in the key text field.
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Press the encrypt button. Use all but the first character of the output
as your key.
Here is the souce code for this applet, VigenereApplet.java,
the application source code and BreezyGUI
information.