Dependency installation.
$ virtualenv venv
$ source venv/bin/activate
$ pip3 install -r requirements.txt
Encryption:
$ python3 main.py enc -i <inputfile.png> -o <outputfile.png> -p password
Decryption:
$ python3 main.py dec -i <inputfile.png> -o <outputfile.png> -p password
Help:
$ python3 main.py --help