Universal flash storage device for preventing replay attack, operating method thereof, and universal flash storage system

A method of operating a universal flash storage (UFS) device configured to communicate with an external device, the method comprising:

• receiving a replay protection memory block (RPMB) write request comprising a first write failure index, meta information, and a first message authentication code generated based on the first write failure index and the meta information;
• identifying whether to perform an authentication operation on the external device based on a second write failure index included in an RPMB region of the UFS device and the first write failure index;
• and
• based on performing the authentication operation, outputting a response comprising a result of the authentication operation.

A universal flash storage (UFS) system comprising:

• a UFS host comprising:
• at least one host processor;
• and
• at least one host memory storing one or more host instructions,
• wherein the at least one host processor is configured to execute the one or more host instructions to cause the UFS host to:
• obtain a first message authentication code based on a first write failure index and meta information, and
• output a replay protection memory block (RPMB) write request comprising the first message authentication code, the first write failure index, and the meta information as an RPMB operation;
• and
• a UFS device comprising:
• at least one device processor;
• and
• at least one device memory storing one or more device instructions,
• wherein the at least one device processor is configured to execute the one or more device instructions to cause the UFS device to:
• determine whether to perform an authentication operation on the UFS host based on the first write failure index.