README: CBC Vigenere Project
by:	Katherine Miller
	katherinemiller@umbc.edu
-----------------------------------------------------------
This program uses cipher block chaining along with the
Vigenere encryption algorithm to encrypt and decrypt 
messages. To encrypt a message, type or paste message into
text area labeled "Plaintext" and specify a key in the
text area labeled "Key." Then click Encrypt and the program
will encrypt your text and place it in the text area labeled
"Ciphertext." Place your text in the "Ciphertext" text area
along with a key in the "Key" text area to decrypt. To
specify and IV (initialization vector), click "Specify 
Initialization Vector" and use the input box to specify.
Obviously it should be the same length as the key, which is
used as block length in the CBC algorithm. The algorithm 
uses character shift and therefore only uses alphabetic 
characters of the inputted key, and operates only on 
alphabetic characters in your message. If you enter a key 
of differing length from the IV, or vice versa, the program
will prompt you to fix it before continuing. If you click
"Encrypt" or "Decrypt" without filling out all required 
fields, the program will not do anything.