Method for Determining Debug Authorization for Motherboard Control Module and Associated Motherboard Control Module

摘要

By comparing a chip unique password, certification for activating a debug function can be established on the chip unique password. Thus, even when the chip unique password is lost due to negligence, not only certification for activating debugging on other motherboards of the same model number can remain unaffected, but also risks caused by replacing a chip or by a private key leakage from a system manufacturer are eliminated.

主权项

1. A method for determining debug authorization for a motherboard control module, the motherboard control module comprising a chip and a flash memory, the chip storing a device identity of the motherboard control module, the flash memory comprising a plurality of data regions; the method comprising:
obtaining a corresponding chip unique password according to the device identity and a data region identity of a first data region of the data regions; and comparing a characteristic of the chip unique password with a first chip unique reference password stored in the first data region, and deactivating a digital signature authentication mechanism to authorize an execution of debugging of the flash memory when the characteristic of the chip unique password matches the first chip unique reference password.