Patent ID: 11902434
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 9:
10. A method of operating a customer replaceable unit monitor CRUM integrated circuit (IC), comprising:
operating in a test mode and operating in a user mode, wherein:
operating in the test mode includes:
performing decryption of an encrypted test code to generate a decrypted test code;
storing the decrypted test code in a volatile memory; and
turning off a security function of the CRUM IC while performing a test command for performing a wafer level test on the basis of the decrypted test code, and

operating in the user mode includes:
performing authorization in response to an encryption key received from a host; and
monitoring the CRUM IC using a user code stored in a read-only memory.