Ec Sign P384Sha384
ECDSA on the NIST P-384 curve with a SHA384 digest. Other hash functions can also be used: https://cloud.google.com/kms/docs/create-validate-signatures#ecdsa_support_for_other_hash_algorithms
ECDSA on the NIST P-384 curve with a SHA384 digest. Other hash functions can also be used: https://cloud.google.com/kms/docs/create-validate-signatures#ecdsa_support_for_other_hash_algorithms