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Userspace<br />
UserEventAgent<br />
Darwin lock/unlock<br />
Notifications<br />
1) device locks<br />
SpringBoard<br />
MobileKeybag.framework<br />
3) send lock notification<br />
XNU (Kernel)<br />
AppleKeyStore<br />
SEP Endpoint to SKS<br />
SEP<br />
SKS<br />
2) purge class A and class B priv keys<br />
SKS keyring<br />
class B (public)<br />
class C<br />
class D<br />
SKS memory<br />
master key + SEP UID<br />
class A<br />
class B (priv)<br />
class C<br />
lock