Which of the Following Statements About AK/SK Authentication Process Is

Which of the following statements about AK/SK authentication process is incorrect?

A) When a user sends a data request, the OceanStor 9000 uses the hash-based message authentication code HMAC algorithm to encrypt SK and request content, and then generates a signature.
B) After receiving the request and signature, the OceanStor 9000 uses AK to query SK.
C) After SK is queried, the OceanStor 9000 uses the MDS algorithm to encrypt SK and request content, and then generates a signature.
D) The OceanStor 9000 compares the received signature with the one that calculated by the system. If the two signatures are consistent, the authentication succeeds.