What security area is not typically shared between the cloud provider and the customer?

In a cloud computing environment, the security model is often described as a shared responsibility between the cloud provider and the customer. This means that certain security responsibilities are managed by the provider, while others are the customer's responsibility.

When it comes to the severity of incidents, this aspect is primarily the concern of the customer. The cloud provider may have its own processes for monitoring and managing security incidents, but the customer typically has the responsibility to assess the severity of incidents based on their specific operational context and the impact those incidents have on their data and applications. The customer needs to understand and evaluate how incidents could affect their business operations, compliance needs, and data integrity.

The other areas, such as infrastructure security, application security, and platform security, involve collaborative efforts where both the cloud provider and the customer have specific roles. The cloud provider secures the underlying infrastructure and may provide security tools or services, whereas the customer is responsible for securing their applications and ensuring they meet security best practices within the platform. Therefore, the severity of incidents is more aligned with the customer's perspective and responsibility, making it the correct answer to the question.