Author: Todd A. Whittaker
This program will encrypt and decrypt files using a simple XOR based key cypher.
Encryption works by taking each character in the input text, treating it as an integer, and exclusive or'ing (XOR) it with the next character in the key phrase (also treated as an integer). The integers are output, comma separated, in the output text area.
Decryption works in the inverse manner. Each integer is read from the comma separated list, XOR'ed with the next character in the key phrase, and then converted back to a character and appended to the output text area.