I have a backup routine via crontab on Ubuntu. This routine generates a compressed tar.gz file and sends it to AWS S3.
But I want to encrypt these files and be able to decrypt them when necessary on another machine only if I have the private key.
While searching I found gpg, and I execute the command below to compress the backup file:
gpg --output my-backup-file.tar.gz.gpg --encrypt --recipient firstname.lastname@example.org my-backup-file.tar.gz
Is this a safe and good way to encrypt these files?