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A comment on Privacy: Is That iPhone?. Parent comment

Re:Privacy: Is That iPhone? by mrgreenfur on Wednesday November 13, 2019 @11:30AM (#21525969)
Generating your own UUID is forbidden I thought?

What if apple sandboxed it to each app to make it safer/easier?

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Re:Privacy: Is That iPhone? by tinus_hn on Wednesday November 13, 2019 @06:22PM (#21530898)
You can’t look through device identifiers like the MAC address or the serial to create ids.
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Re:Privacy: Is That iPhone? by varenc on Wednesday November 13, 2019 @07:50PM (#21531612)
since iOS 7 Apple always returns "02:00:00:00:00:00" for the WLAN MAC address for this very reason.

Besides the IDFA Apples seem to have tried hard to get rid of the obvious ways for different apps to link activity between their users. Of course if you login or provide an email it becomes easy...and there's plenty of trickier less reliable ways like looking at IP address

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