Final answer:
HSMaaS is the best solution for the security architect's objectives of managing encryption keys securely and with reduced latency in a multi-cloud provider environment.
Step-by-step explanation:
In order to address the concerns of managing multiple encryption keys securely and with reduced latency in a multi-cloud provider environment, the security architect should consider using HSMaaS (Hardware Security Module-as-a-Service). HSMaaS offers a centralized and secure way to manage encryption keys in a multi-cloud environment, providing consistent control and management regardless of data location. With HSMaaS, the organization can incorporate existing keys and have a centralized system for managing them.
Learn more about HSMaaS