The touchbar is similar to an iOS device so it is a separate computing device that has a small attack surface so it is difficult to hack.
It for instance controls the camera, so without hacking the touchbar it is impossible to use the camera without the light turning on.
It also controls the fingerprint reader in a way that makes it hard to get the secrets that are protected by the fingerprint without actually providing the fingerprint.
It for instance controls the camera, so without hacking the touchbar it is impossible to use the camera without the light turning on.
It also controls the fingerprint reader in a way that makes it hard to get the secrets that are protected by the fingerprint without actually providing the fingerprint.