All leading cloud service providers follow a shared responsibility model, where certain aspects of security are managed by the service provider, while the customer is responsible for other security measures. The specific responsibilities vary depending on the type of cloud deployment, such as infrastructure-as-a-service (IaaS), platform-as-a-service (PaaS), or software-as-a-service (SaaS). Customers must understand the shared responsibility matrix and ensure that the relevant security controls are implemented at their end to protect their cloud deployments.