android external storage encryption keys

android external storage encryption keys

Any one knows where android is keeping private keys for external storage
encryption? There is such option (ext storage enc) in some versions of
android 4.1+ (at least in samsung series).
The thing is that it warns you before encryption that if your phone breaks
you wont be able to recover data. I assume it is because as always
encryption keys are encrypted with user password. So user password alone
is useless and the keys are kept somewhere in tge internal memory.