For those seeking the source:

> The researchers presented their results at the "ACM Conference on Computer and Communications Security" (CCS) in Taipei.

This citation at the bottom might be the paper:

Julian Todt, Felix Morsbach, Thorsten Strufe. BFId: Identity Inference Attacks Utilizing Beamforming Feedback Information. , DOI: 10.1145/3719027.3765062