One-Time Pad Encryption
This is another first year project, which uses a one-time pad to encrypt a simple text based message. The output file and key can then be used to reconstruct the original message.
This program encrypts text by XORing an input character with a randomly generated key character, and then writing both to files. The message can then be restored by simply XORing the output character to it's corresponding key character.
A one time pad is theoretically impossible to break by analysing a succession of messages, as each encryption is unique. However, the decrypting party must have a copy of the same key used for encryption, so it is only secure as long as the key remains secret.
Because this program uses pseudo-randomly generated numbers using the c standard libraries, the key can easily be reconstructed. If you're looking for secure, reliable one-time pad software, you've come to the wrong place. However,if you only want to see how OTP encryption works, feel free to give it a try.
Usage: encrypt [options] Where [options] include: -e select encryption mode -d select decryption mode -i [infile] set input file (default in.txt) -k [keyfile] set key file (default key.txt) -o [outfile] set output file (default out.txt) -debug enable debug output
