One of the components that ships with the commercial Docker Datacenter is Docker Trusted Registry (DTR). Think of it as a version of Docker Hub that you can host in your own infrastructure. DTR adds the following features on top of the ones provided by the free Docker Hub and Docker Registry:

• Integrated into your authentication services such as Active Directory or LDAP
• Deployed on your own infrastructure (or cloud) behind your firewall
• Image signing to ensure your images are trusted
• Built in security scanning
• Access to prioritized support directly from Docker

More information on Docker Trusted Registry can be found at https://docs.docker.com/datacenter/dtr/2.2/guides/.