Vigenère cipher implementation in pure python for files.
Usage:
For encryption:
$ python3 main.py -e -k key input_filename output_filename
For decryption:
$ python3 main.py -d -k key input_filename output_filename
⚠ CAUTION: This cipehr is not recommended to use in real life. This is a historic cipher, it can be easily broken with current technology. [For educational purposes only]