Only when the user enters his PIN or the device code does the iPhone load the required encryption keys into the memory. As a result, it changes to the AFU state (“After First Unlock”), in which more data are deciphered-even if the device is then blocked again.
That was the reading sample of our Heise Plus article “Reboot is good: why the iPhone automatically restarted for security reasons”. With a Heise Plus subscription you can read and listen to the whole article.
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