# Effect of Data Degradation on Motion Re-Identification

arXiv: https://arxiv.org/abs/2407.18378 · HTML: https://mlsanity.com/paper/2407.18378/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 25 Jul 2024.

## Built on by (most cited first, 1 of 1)

- [Motion-Based User Identification across XR and Metaverse Applications by Deep Classification and Similarity Learning](https://mlsanity.com/paper/2509.08539/) (2025)

## Abstract (arXiv)

The use of virtual and augmented reality devices is increasing, but these sensor-rich devices pose risks to privacy. The ability to track a user's motion and infer the identity or characteristics of the user poses a privacy risk that has received significant attention. Existing deep-network-based defenses against this risk, however, require significant amounts of training data and have not yet been shown to generalize beyond specific applications. In this work, we study the effect of signal degradation on identifiability, specifically through added noise, reduced framerate, reduced precision, and reduced dimensionality of the data. Our experiment shows that state-of-the-art identification attacks still achieve near-perfect accuracy for each of these degradations. This negative result demonstrates the difficulty of anonymizing this motion data and gives some justification to the existing data- and compute-intensive deep-network based methods.