Lock
Lock private keys with a local passphrase to keep them protected inside .env.keys.
$ dotenvx lock
Security note
Lock security is only as good as the passphrase you choose. If an attacker gets your .env.keys file, they can try to brute force the locked private keys offline for as long as they want.
For stronger security, use Armor to move private keys out of .env.keys and into Dotenvx Armor.