Unique Identification of 50k VR Users from Head and Hand Motion Data

Hold up. They did this on beat saber… with a 50000 class output (one per user).

They seem to be using mod songs, and are not accounting for the fact that people are playing different songs.

Your motion is entirely determined by the song. I think they’re just identifying pairs of song choice and user height.

Note that one of their metadata features is “replay > 100”, meaning they probably have examples of the same user doing the same song many many times

I don't think too many people realize the danger of applications phoning home to the vendor isn't limited to desktop PCs and portable devices, nor is the type of information they can harvest limited to personal information or your web browser history.

Really cool, and really scary at the same time. As a frequent VR user, it would make sense that my movements are unique enough to fingerprint me, but it's not something I've ever thought about.

This reminds of the study that showed it was possible to fingerprint a person based on acceleration data from their phone when walking.