The following diagram highlights how the Shared Responsibility Model tells who is responsible for what, depending on the cloud service type. The shared responsibility model applies to all the cloud service types.
- With an on-premises datacenter, you’re responsible for everything. With cloud computing, those responsibilities shift. The shared responsibility model is heavily tied into the cloud service types: infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS). IaaS places the most responsibility on the consumer, with the cloud provider being responsible for the basics of physical security, power, and connectivity. On the other end of the spectrum, SaaS places most of the responsibility with the cloud provider. PaaS, being a middle ground between IaaS and SaaS, rests somewhere in the middle and evenly distributes responsibility between the cloud provider and the consumer.
