Can internal PinePhone firmware be compromised?
Perhaps a stupid question. Is there any firmware in PinePhone which could be compromised by the OS? For example, I heard that a compromised OS on a laptop can compromise BIOS, which makes the computer insecure without recurse (and you won't know it unless you have Anti Evil Maid).
Let's say I install some untrusted OS on the eMMC, use it, then wipe it. After that I boot from a trusted microSD, can I be sure that I am not compromised?
I am also thinking about such a use case: I have untrusted OS on the eMMC, where I collect all the viruses I want. When I need to do something security-critical (e.g., open my email), I insert a microSD with a bootable trusted OS, use it and then remove the microSD again returning to the initial untrusted OS. Would such access to the email be secure?
Let's say I install some untrusted OS on the eMMC, use it, then wipe it. After that I boot from a trusted microSD, can I be sure that I am not compromised?
I am also thinking about such a use case: I have untrusted OS on the eMMC, where I collect all the viruses I want. When I need to do something security-critical (e.g., open my email), I insert a microSD with a bootable trusted OS, use it and then remove the microSD again returning to the initial untrusted OS. Would such access to the email be secure?