Computer apparatus and authority management method based on trust chain

A computer apparatus, comprising:

• a plurality of peripheral apparatuses, having a plurality of corresponding functions;
• a non-volatile memory, configured to store a plurality of boot codes and a plurality of setting values of a function set of the peripheral apparatuses corresponding to each boot code, wherein the boot codes form a chain of trust;
• a processor, configured to execute one of the boot codes in the chain of trust as a current boot code, wherein the current boot code corresponds to a first function set of the peripheral apparatuses;
• and
• an authority-control circuit, electrically connected to the processor and the peripheral apparatuses, configured to read the setting values of the function set of the peripheral apparatuses corresponding to each boot code from the non-volatile memory;
• wherein in response to execution of the current boot code being completed, the authority-control circuit sets the setting values of the functions in a second function set corresponding to a next boot code in the chain of trust, sends an authority-control signal to control the peripheral apparatuses corresponding to the second function set according to the setting values of the functions in the second function set, and sets a boot flag corresponding to the next boot code in the authority-control circuit to control the processor to execute the next boot code,
• wherein the first function set is different from the second function set.