Security Bite: What exactly does Vision Pro share about your surroundings?

Last week, Apple finally released an in-depth Vision Pro and visionOS data privacy overview. While it was arguably something that the company could’ve been available at launch, it helps explain what precisely the spatial computer collects from our surroundings and sends to third-party applications, and more…

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Privacy, shmivacy: Why should I care?

For many of the security researchers I talk to, mentioning mixed reality comes with much trepidation. While consumers are more worried about the near-$4,000 Vision Pro price tag, those in the security field seem more aware of the dangers. After all, this device has six microphones and twelve cameras you wear around your home.

As I highlighted in a previous Security Bite post, the general privacy risks of Apple Vision Pro or any headset can be alarming. For example, the distance from the ground measured by depth sensors can determine a user’s height. The sound of a passing train could help point to a physical location. A user’s head moments can be used to determine emotional and neurological states. Data collected on the user’s eyes is arguably the most concerning. Not only could this lead to targeted advertising and behavioral profiling, but it could also reveal sensitive health information. It’s not uncommon for eye doctors to help diagnose patients for ailments simply by looking at their eyes.

New Vision Pro surroundings privacy details

While seemingly real, environments within the Apple Vision Pro are created using a combination of camera and LiDAR data to provide near real-time viewing of a user’s space. In addition, visionOS uses audio ray tracing to simulate the behavior of sound waves as they interact with objects and surfaces. Applications overlay these scenes or, in some cases, create environments of their own.

With the release of the new Vision Pro privacy overview, we now have a better understanding of what surroundings data is sent off the headset and shared with applications.

1. Plane estimation: Detects flat surfaces nearby where virtual 3D objects, or what Apple calls Volumes, can be placed. It enhances immersion by allowing users to interact with virtual objects as part of their physical environment.
2. Scene reconstruction: Scene reconstruction involves creating a polygonal mesh that accurately represents the outline of objects within the user’s physical space. This mesh helps virtual objects align correctly with physical objects in the user’s environment.
3. Image anchoring: This feature ensures that virtual objects remain anchored in their intended positions relative to real-world objects, even as the user moves around. The WSJ’s Joanna Stern demonstrated this technology early on in a video posted to X where she’s seen placing multiple timers over objects boiling on a stove.
4. Object recognition: Apple states it uses object recognition to identify “objects of interest in your space.” In a broad sense, it is used by Vision Pro to make out what is in your environment.

By default, apps can’t access data about surroundings on Vision Pro. In order to make experiences that much more realistic, third-party developers may want access to these surroundings data. This is a similar process to tapping to allow access to Photos or Camera on an iPhone; a Full Space in Vision Pro can access surroundings data to support more immersive experiences.

“For example, Encounter Dinosaurs requests access to your surroundings so the dinosaurs can burst through your physical space. By giving an app access to surroundings data, the app can map the world around you using a scene mesh, recognize objects in your surroundings, and determine the location of specific objects in your surroundings,” Apple explains.

However, any app will only get access to information about your surroundings within five meters of where you are. This is why immersion elements like shadows and reflective areas no longer exist beyond this distance.

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