What will the government even do with my heart rate and blood oxygen data?

"Mr Smith has been running again, we better bring him in for questioning!"

Edit: to be clear, the government is requesting the data, so clearly they're doing something with it... But what? I don't see it!

Target infamously was inferring when teenage girls were pregnant before their parents knew based on reward card data records of single merchant retail purchases.... in 2002.

Tech companies when they speak to VCs: look at all the creepy things we can infer with ooodles of aggregated data and AI to maximize targeted ad revenue, we're worth 50x what an equivalent non-tech company in our sector is valued, because of all the things we can do with all that data from all those people together

Tech companies when they speak to their customers: oh you're so silly to even ask about privacy, what possible utility could there be in that single isolated variable?

Buys your heart rate and blood oxygen data from Oura. Collects your iris data from Eyez. Purchases your fitness data from Borg. Sees your purchasing patterns through Krump. Knows everything you've said online through Gwimp. Gets your sequenced DNA from FamaTree. Tracks your location data from, well, nearly every app in existance.

What could they possibly do from this single variable???

Ordering a taxi after running outside of US? Probably missed some mass transport. Raise the price boys... like good old Uber back in the day based on iphone battery level. Really the possibilities are endless if you're evil.

Bad health? Raise the insurance premiums? Or anything more evil I can't think of.

edit: grammar

Most likely biometric data on crime suspects to correlate with other forensic data. Obtaining this data on a case by case basis is expensive so it is most likely to be used in high stakes cases like murders or bank robberies where police and prosecutors need to show a win.

For example, A is known to have been an associate of B. B died violently at a certain time and date. Phone data put both of them in the same general area around that time. A seems evasive and won't talk. But A's biometric data reveals intense physical activity around the time of B's death...

Other suggestions in this thread like algorithmically making things worse for people in general are predicated on continual availability for a whole deanonymized population.

Also if you're a woman biological signals can be used to know when you are on your cycle and thus missed it.

I’ve seen stories where fitness trackers were used to tie someone to a murder.

https://en.wikipedia.org/wiki/Murder_of_Connie_Dabate

He was running at the same time our cops were chasing people. Bring him in.

They'll know when and how often you're awake or sleep (including how well you slept), sick, fucking, drunk or high, anxious or upset, relaxed, shitting, menstruating, medicated, etc. Combined with other data and tracked over time there is a shocking amount of intimate information you can get from just those two things which is why companies like Oura and Fitbit are so eager to get their hands on it.

No one seems to care anymore, but a big issue that people were concerned about in the 2000s was the switch from 'I know more about me than the blob (corps, gov, etc) does' to, 'I need the blob to remind me where the hell I was that day'. Heart rate and blood oxygen data are hard to exploit data points but not impossible(1), but facing an accusation from someone who knows more about your movements than you do is an uncomfortable scenario. Of course right now, if you're facing an acusation of this type, odds are it's legitimate, or if not, defenseable, but that was the case 15 years ago in Türkiye, but isn't now. Things change.

(Note 1:"Dr. Bootlicker, the defendant wants the court to believe that she calmly placed herself between the agent and the minor he was trying to apprehend, and asserts that the agent's claim, that the defendant's actions constitute assault, is, in her words, 'ridiculous'. But am I correct in understanding that you view minutes 8 and 9 of the biometric data submitted to the court as characteristic of significant physical exertion that might be similar to that undergone by an assailant while commiting an assault?")

They used iPhone pick up and orientation data to build a narrative in the trial of Alex Murdaugh, so I imagine something similar.

What will the government even do with my heart rate and blood oxygen data?

It's not in isolation. It's in aggregation. So you end up with

"Mr. Smith's heart rate goes off the charts for six minutes every time his phone visits this apartment building in the middle of the night and is within radio range of Ms. Jones' phone."

Location and time

You're on Hacker News, think like a hacker - in both meanings of the term - for what could possibly go wrong.