Does anyone know where Qualcomm's keymaster stores its keys?
I know it's under TEE, but it must still be using the UFS.
I've wondered why reverting back to old userdata after a data wipe always breaks keyguard (pattern).
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no, it's been this way since the introduction of keymaster iirc.
FBE might be handling this differently, I'm running unencrypted. Android must be saving the pattern key specially.
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There is Replay Protected Memory Block (RPMB) support to prevent downgrading keys to an older version.
How would it know it's "older" when one's replacing it as a whole?
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