Secure Boot on Pine64

[z4v4l]

Hi,

I wonder if there is support for secure/trusted boot on Pine64? And how to use it?

If you mean UEFI Secure boot capability, then it will be there when UEFI support for this board is presented.
Cortex-A53 containing in the Pine64's SoC has Security Extension included, this is the ARM hardware thing for "trusted" environments support. so this is the question of the SW support of it.
For now, there is no such, but I bet there are people working on this. I am working on UEFI implementation, but I should admit - it's yet too early to promise Secure Boot on Pine64.
As of the current fw on here, u-boot, I don't know much, but most probably, no, it is not Secure Boot capable.