CSP

A vendor that delivers computing services over the internet, such as IaaS or SaaS.

A CSP is a vendor that delivers computing resources over the internet under service models such as IaaS, PaaS, and SaaS, letting customers consume infrastructure and applications on demand. Using a provider introduces the shared responsibility model, in which the provider secures the underlying platform while the customer remains responsible for data, identity, and configuration. Misunderstanding this division is a leading cause of cloud breaches, since misconfigured storage and access remain the customer's duty regardless of provider safeguards.