Compress folder into an encrypted tar.gz. Taken from https://superuser.com/questions/162624/how-to-password-protect-gzip-files-on-the-command-line
Encrypt
tar cz folder_to_encrypt | openssl enc -aes-256-cbc -pbkdf2 -iter 100000 -e > out.tar.gz.enc
Decrypt
openssl enc -aes-256-cbc -iter 100000 -d -in out.tar.gz.enc | tar xz