[yeukhon]

Two questions:

* Regarding the fixed 80ms timing: has there been study on the average time needed (aside from the WHY 80ms instead of 70ms or 90ms). I also want to ask for clarification: where is the entire PBKDF2-AES is done? On the AES engine (which I believe is part of the A7 chip)? On a TPM chip (which might be a NO based on unauthenticed source [1])?

* So this UID created in every device and stored in Secure Enclaved which there is a dedicated path between SE and AES engine. But can we conduct any side-channel attack? I am pretty noob with hardware security.