Capt. Horatio T.P. Webb
A VBScript Simple Encrypter/Decrypter

Parks -- FALL 1998
Last Updated 12PM 10/6/98

Note 1: for the javascript version click (here)
Note 2: in IE9, IE10 and IE11 you must set the browser to "Browser Mode" to IE8
Click the gear in the upper right hand corner of the bie9, 10 or 11 browser, then
Click "Development Tools", on the top line, click "Browser Mode" and set to IE8.

1. Enter a Key (any text)

2. Enter Plain Text (any text)

3. Cipher Text (this is the encryted message you send)

We now take the Cipher text (3 above) and XOR it with the key (1 above) and we get:

4. Recovered Plain Text (this is the decoded message)

This form of encryption is called a Vernam Cipher (aka "Not Equal (NEQ)", "modulo 2 addition (without 'carry')", "modulo 2 subtraction (without 'borrow')". Invented by Gilbert Sandford Vernam (1890-1960).