All of these technologies have made cloud service viable except:

The correct answer is that smart hubs do not directly contribute to making cloud services viable. The viability of cloud services relies more heavily on technologies that improve data security, efficiency, and connectivity.

Cryptographic connectivity ensures that data is securely transmitted across the cloud, protecting it from unauthorized access during transmission. This is essential for maintaining security and privacy, which are crucial for consumer and business trust in cloud services.

Virtualization plays a fundamental role in the cloud by allowing multiple virtual machines to run on a single physical machine. This optimizes resource utilization and provides flexibility in managing computing resources, thus making cloud services more efficient and cost-effective.

Widely available broadband is critical for cloud service accessibility. Fast and reliable internet connections enable users to access cloud-based applications and data without significant delays. This is a foundational element of the cloud's functionality, allowing users to interact with services seamlessly.

In contrast, while smart hubs can enhance connectivity and automation in smart environments, they do not have a direct impact on the core strategies and technologies that support the foundational architecture and security of cloud computing.