The lock is exposed to the public, anyone with the right key can open the door.

The public-private key pair is like the lock on your front door. We recommend connecting to a VM over SSH using a public-private key pair, also known as SSH keys. Although SSH itself provides an encrypted connection, using passwords with SSH still leaves the VM vulnerable to brute-force attacks. SSH is the default connection protocol for Linux VMs hosted in Azure. SSH is an encrypted connection protocol that allows secure sign-ins over unsecured connections. For a more detailed overview of SSH, see Detailed steps: Create and manage SSH keys for authentication to a Linux VM in Azure. To use SSH keys from a Linux or macOS client, see the quick steps. You can also generate and store SSH keys in the Azure portal to use when creating VMs in the portal. This article is for Windows users who want to create and use secure shell (SSH) keys to connect to Linux virtual machines (VMs) in Azure. Applies to: ✔️ Linux VMs ✔️ Flexible scale sets

What is my host key virtualbox