I'd like to access heart rate data from the Apple Watch. Can I be sure that the data is authentic and really coming from an Apple Watch?
I found that devices can add digital signatures to their data: https://developer.apple.com/documentation/healthkit/samples/adding_digital_signatures, but I don't know if the Apple Watch supports this. And if it does, I wonder how secure this is? Is there a tamper-resistant storage with the private key on the Apple Watch device?