Security for IoT needs to be considered from the start of design and not retrofit at the end of a program or in the field. At that point, it is too late. Security also needs to be viewed holistic from the hardware to the cloud. This section illustrates a simple IoT project from the sensor to the cloud and illustrates the "blanket" of security to consider. The intent is to deploy a system with various levels of safeguards, all there to increase the attacker's work function.
Narrowly focusing on one segment of IoT doesn't provide security and establishes a weak link in the security chain. One needs to establish security from the sensor to the cloud and back—a holistic approach. Each component in the chain of control and data should have a checklist of security parameters and enablers. The following diagram illustrates an example of the layers of security from the sensor to the cloud to consider in a deployment:
Sensor to cloud holistic security....