Privacy Leakage in Proactive VR Streaming: Modeling and Tradeoff

03/07/2022
by   Xing Wei, et al.
0

Proactive tile-based virtual reality (VR) video streaming employs the viewpoint of a user to predict the tiles to be requested, renders and delivers the predicted tiles before playback. Recently, it has been found that the identity and preference of the user can be inferred from the trace of viewpoint uploaded for proactive streaming, which indicates that viewpoint leakage incurs privacy leakage. In this paper, we strive to answer the following questions regarding viewpoint leakage during proactive VR video streaming. When is the viewpoint leaked? Can privacy-preserving approaches (e.g., federated or individual training, using predictors with no need for training, or predicting locally) avoid viewpoint leakage? We find that if the prediction error or the quality of experience (QoE) metric is uploaded for adaptive streaming, the real viewpoint can be inferred even with the privacy-preserving approaches. Then, we define viewpoint leakage probability to characterize the accuracy of the inferred viewpoint, and respectively derive the probability when uploading prediction error and QoE metric. We find that the viewpoint leakage probability can be reduced by sacrificing QoE or increasing resources. Simulation with the state-of-the-art predictor over a real dataset shows that such a tradeoff does not exist only in rare cases.

READ FULL TEXT

page 7

page 17

page 19

page 23

research
10/20/2021

FoV Privacy-aware VR Streaming

Proactive tile-based virtual reality (VR) video streaming can use the tr...
research
04/29/2021

Spatial Privacy-aware VR streaming

Proactive tile-based virtual reality (VR) video streaming employs the cu...
research
04/20/2021

Privacy-aware VR streaming

Proactive tile-based virtual reality (VR) video streaming employs the cu...
research
06/27/2019

An Algorithm for Transmitting VR Video Based on Adaptive Modulation

Virtual reality (VR) is making waves around the world recently. However,...
research
10/30/2019

Prediction, Communication, and Computing Duration Optimization for VR Video Streaming

Proactive tile-based video streaming can avoid motion-to-photon latency ...
research
10/30/2019

Matching Prediction to Communication and Computing in Proactive VR Video Streaming

Proactive tile-based video streaming can avoid motion-to-photon latency ...
research
03/07/2019

HTML5 MSE Playback of MPEG 360 VR Tiled Streaming

Virtual Reality (VR) and 360-degree video streaming have gained signific...

Please sign up or login with your details

Forgot password? Click here to reset