The CPU contains both the UID and GID on all iPhones (old and new). The Secure Enclave, if available, contains it's own UID for it's own key derivation. https:

The CPU contains both the UID and GID on all iPhones (old and new). The Secure Enclave, if available, contains it's own UID for it's own key derivation. https://mikeash.com/pyblog/friday-qa-2016-02-19-what-is-the-secure-enclave.html https://mikeash.com/pyblog/friday-qa-2016-02-19-what-is-the-...