Tangentially related: It's wild what new data can be used for fingerprinting. [1] describes using magnetic signals to fingerprint a device. [2] describes ident

Tangentially related: It's wild what new data can be used for fingerprinting. [1] describes using magnetic signals to fingerprint a device. [2] describes identifying inputted text from CPU interrupt data. I wouldn't be surprised if health data can also be used to fingerprint users, even across devices. I wonder what lower level runtime information (e.g. CPU interrupt data) is available to apps. [1] https://dl.acm.org/doi/abs/10.1145/3319535.3339810 https://dl.acm.org/doi/abs/10.1145/3319535.3339810 [2] https://www.repository.cam.ac.uk/handle/1810/254306 https://www.repository.cam.ac.uk/handle/1810/254306