Which of the following security measures is required when using a cloud-based platform for IoT management?

An encrypted connection is essential for IoT management in a cloud-based platform because it protects the confidentiality and integrity of data transmitted between IoT devices, the cloud platform, and management interfaces. Given the sensitive nature of IoT data and control commands, encryption prevents eavesdropping and tampering by unauthorized parties. Federated identity and single sign-on (SSO) are primarily authentication and authorization mechanisms that simplify user access but don't directly secure the data in transit. While important for managing user access to the platform, they don't replace the need for encrypted communication channels. A firewall is a network security device that controls incoming and outgoing network traffic based on predetermined security rules, protecting the network perimeter. While crucial for the cloud infrastructure, it doesn't inherently encrypt the data flowing between endpoints and the cloud platform itself.