how you want to prevent it to be dumped? using other hardwares or just designing one?

as far as i know, every hardware can be dumped with a physical access.

we were thinking about encryption of the key and asking user for pass word or fingerprint. 

 security is a layered approach

one of them is having a secure element

there’s more that I will publish later :) 

 cool, it would be cool to see your approach.

ill try to share as well, but the process is freeze in our team due the lack of time.