_uuidForDevice starts to return the same UUID for different devices (issue probably started around iOS 16.6.1)

fabiocaccamo / FCUUID

:iphone: :id:  iOS UUID / Universally Unique Identifiers library as alternative to UDID and identifierForVendor.

MIT License

1.61k stars 226 forks source link

_uuidForDevice starts to return the same UUID for different devices (issue probably started around iOS 16.6.1) #39

Closed duxthefux closed 9 months ago

duxthefux commented 10 months ago

Hi,

we're currently seeing the case where 2 different iPads, which use the same apple ID would generate the same UUID, which is obviously not what one wants.

We don't know for sure, but it seems it all started with around iOS ~16.6.1.

Is anybody else seeing this, or even knows a fix for it?

Thanks a lot!

Upvote & Fund

We're using Polar.sh so you can upvote and help fund this issue.
We receive the funding once the issue is completed & confirmed by you.
Thank you in advance for helping prioritize & fund our backlog.

fabiocaccamo commented 9 months ago

@duxthefux I think that in this case the UUID has been synced between the devices via the keychain: https://github.com/fabiocaccamo/FCUUID#persistence

duxthefux commented 9 months ago

@fabiocaccamo We found the issue on the weekend. It was because some users restored an iCloud backup from device A on device B and kept using device A and B at the same time. The local keychain obviously is also restored in this case.

Good to close it, as it's not a library issue.

Thanks!

Maybe this thread helps people you run into something similar.

fabiocaccamo commented 9 months ago

@duxthefux thank you for having provided more informations, this will be surely useful to someone else!

Could you give a look to #30?