The clever cryptography behind Apple’s “Find My” feature

Re:The clever cryptography behind Apple’s “Find My” feature by MBCook on Saturday June 08, 2019 @08:48PM (#20136219)

That only works if the devices report WHO saw the missing device. If they both report up that the device is in the area ask but don’t say who is making the report then you can’t figure that out.

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Re:The clever cryptography behind Apple’s “Find My” feature by lixtra on Sunday June 09, 2019 @02:20AM (#20137511)

Apple sees the reporting device’s ip-address. Obviously Apple is in an excellent position to spy you anyway, but the claim that even Apple doesn’t know where the turned off device is doesn’t hold for the reporting devices: Apple can infer which reporting devices are in proximity. And they possibly even know who the reporting IP is because of iCloud.

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Re:The clever cryptography behind Apple’s “Find My” feature by bonestamp2 on Sunday June 09, 2019 @11:24AM (#20139780)

I guess that's true, but mobile device IP addresses cover a pretty wide area so it's not terribly precise.

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Re:The clever cryptography behind Apple’s “Find My” feature by lixtra on Sunday June 09, 2019 @11:39AM (#20139883)

But reporting device A and B were in Bluetooth distance to lost device C. Therefore A and B were close together (like a few meters). It’s a huge improvement over A and B were in the same mobile cell.

You can then use the IPs to identify who are A and B.

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