Damn. The "iPhone last setup or erased on ..." is really nasty. What can a user really do about that? I feel like this should be fudged somehow by the OS.
```Based on a binomial/Poisson distribution and a baseline of 21 million U.S. device sales per release, a fingerprint relying on "seconds since setup" fails to uniquely identify individuals. In the high-density Early Adopter phase, you will share your exact setup second with an average of 1.01 other people (a total matching pool of ~2 people). Six months into the cycle, you will still share that second with an average of 0.68 other people.```
In the U.S., device setup time (to the second) very conservatively gets you clubbed into a single group of 100 individuals as an "advanced persistent threat" tracker. Even compressing activations to "80/20 during business hours" the math kindof maxes out at a pool of ~5 people, and assuming worst case "20x" of that still means you're still pretty darned identifiable.
If you get ~6-8 more bits of entropy (eg: Device Type + Capacity is easily 2-3 bits, and Time Zone is probably another 2-3 bits) you're cooked!
Yes. Got my ps and ws mixed up. I was just reading about the Mt. Rushmore project (I was curious whether or not it was a WPA project -it wasn’t, officially).
Though there is a difference what store apps and non-store apps can do. I think is about store apps which are “sandboxed” and have to use public api to request then access information which non-store apps can access without.
In the U.S., device setup time (to the second) very conservatively gets you clubbed into a single group of 100 individuals as an "advanced persistent threat" tracker. Even compressing activations to "80/20 during business hours" the math kindof maxes out at a pool of ~5 people, and assuming worst case "20x" of that still means you're still pretty darned identifiable.
If you get ~6-8 more bits of entropy (eg: Device Type + Capacity is easily 2-3 bits, and Time Zone is probably another 2-3 bits) you're cooked!
The "Installed Apps Probe" leak also surprised me. It is better than the current state of Android, though.
But very cool.
> Loupe also builds for macOS. The Mac version is mostly complete, but a few things still need work before it's polished.
I got that feeling just seeing the title use "native" as a synonym of "not a website".