And some secure ones used to use it for multi-factor authentication - e.g. you still username/password, but you can only do it on the device that you registered on.
However, use of UDID has been deprecated by Apple, and they are now rejecting some new apps that read it. You're meant to use a unique application-level ID instead.
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And some secure ones used to use it for multi-factor authentication - e.g. you still username/password, but you can only do it on the device that you registered on.
However, use of UDID has been deprecated by Apple, and they are now rejecting some new apps that read it. You're meant to use a unique application-level ID instead.