Root key processing method and associated device
AssigneeMStar Semiconductor, Inc.
InventorMING YONG SUN
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Abstract
A root key processing method and an associated device are disclosed. The root key processing method is performed by a processor connected to a memory configured with an RPMB section, and includes the following steps. The processor detects whether a root key of the RPMB section is already written in the memory after the processor is powered on. If not, in a secure activation process of the processor, the root key of the RPMB section is written to the memory, wherein the secure activation process is that the processor does not activate a non-secure operation system. The method is capable of preventing leakage of the root key from the memory.
Claims11
A root key processing method, performed by a processor connected to a memory configured with a replay protected memory block (RPMB) section, the root key processing method comprising:
- after the processor is powered on, detecting whether a root key of the RPMB section is already written in the memory, wherein the root key is for verifying whether data written to or data read from the RPMB section has been illegally modified;
- if not, in a secure activation process of the processor, writing the root key of the RPMB section to the memory, wherein the secure activation process is that the processor does not activate a non-secure operating system.
Dependencies are inferred from the claim text.