In which cloud deployment are Amazon Web Services, Microsoft Azure, and Google Cloud Platform responsible for physical data center security?

The public cloud deployment model is characterized by services being offered over the internet to multiple clients, where the cloud service provider takes full responsibility for the infrastructure, including physical data center security. In this model, companies like Amazon Web Services, Microsoft Azure, and Google Cloud Platform manage and secure the hardware and facilities that house their services. This means that customers do not need to worry about securing physical assets, as that responsibility lies with the cloud provider.

For example, in a public cloud environment, users access shared resources hosted on the cloud provider's dispersed data centers, benefiting from economies of scale. This allows businesses to focus more on their applications and data rather than underlying infrastructure and physical security measures.

In contrast, a private cloud is exclusively used by a single organization, which then assumes responsibility for securing the data center. A hybrid cloud combines both private and public clouds, where the organization manages safety for its private components but may rely on the provider for the public aspects. A community cloud is shared by several organizations with similar interests but still involves individual organizations overseeing their local security measures. Thus, the public cloud model distinctly places the onus of physical data center security on the cloud providers.