Proof of concept test repo for working with git-crypt
sudo apt-get install git-crypt
cd <REPO_NAME>
git-crypt init
git-crypt export-key /path/to/crypt.key
echo "Secrets!" > secrets.txt
echo "secrets.txt filter=git-crypt diff=git-crypt" > .gitattributes
Decoding encrypted files:
cd <REPO_NAME>
git-crypt unlock /path/to/crypt.key
NOTE: This is the simplest symmetric encryption usage.