With Robocrypt you can encrpyt/decrypt messages, files, or folders using a password. Don't look at the code too hard... It's messy. I modifed an old program to use stronger encryption.
TO DO: Clean up and modularize code, possibly add encryption support for drive partions
python3 -m pip install cryptography
Run python3 Robocrypt.py. Follow the prompts for Encryption / Decryption.
Run python3 Robocrypt.py <path/to/thing>. Follow the prompts.