ProtectionLevel specifies how
cryptographic operations are performed. For more information, see
Protection levels.
Values:
PROTECTION_LEVEL_UNSPECIFIED (0):
Not specified.
SOFTWARE (1):
Crypto operations are performed in software.
HSM (2):
Crypto operations are performed in a Hardware
Security Module.
EXTERNAL (3):
Crypto operations are performed by an
external key manager.
EXTERNAL_VPC (4):
Crypto operations are performed in an
EKM-over-VPC backend.