Enclaves is the per-key manager enclave ID access control policy.
ID is the runtime ID that this policy is valid for.
Optional master_MasterSecretRotationInterval is the time interval in epochs between master secret rotations. Zero disables rotations.
Optional max_MaxEphemeralSecretAge is the maximum age of an ephemeral secret in the number of epochs.
Serial is the monotonically increasing policy serial number.
PolicySGX is a key manager access control policy for the replicated SGX key manager.