I don't think this is new, but I just saw an article about it again, so figured I'd post.
From the article:
"In a study, the researchers describe using beamforming feedback information (BFI) and machine learning models to identify people walking within a networkโs range. The team found that this BFI-based technique was able to infer a personโs identity with 99.5% accuracy."
"...this feedback is unencrypted and can be accessed without the need of specialized hardware or even a direct connection to the WiFi network."
When home WiFi started to become popular I couldn't wait to get rid of the cables. But everything old becomes new again and here I am running cables to any room that needs access.








