The Verge writes that Apple has apparently begun to crack down on apps submitted using the now deprecated UDID (unique device identifier) APIs that allow developers to track individual devices.
The programmer interface used to return an alphanumeric string unique to each deployed device. It was built out of a hash of the unit's serial number and other internal details. Apps that use the uniqueIdentifier API will automatically be rejected as this policy rolls out to its full complement of review teams.
Instead, developers are directed to create unique identifiers specific to applications. Those identifiers can then be stored securely in the d
