Who is responsible for PaaS?

Who’s Responsible for PaaS Security?

When using Platform as a Service (PaaS), one common misconception is that the cloud provider handles everything. The reality? Security is a shared responsibility—both the provider and the customer play crucial roles.

The PaaS provider takes care of the underlying infrastructure: physical data centers, networking, servers, and the operating system layer. This includes patching, system monitoring, and ensuring high availability. In short, they keep the platform running and secure from the ground up.

But it doesn’t end there. As a customer, your responsibilities start where the provider’s end. You’re in charge of securing your applications, managing data encryption, configuring access controls, and safeguarding user identities. If you deploy a web app on a PaaS platform and leave default settings untouched, or fail to restrict access properly, the vulnerabilities are on your side—not the provider’s.

Think of it like renting a secure building: the landlord maintains the walls, locks, and power systems (the infrastructure), but you’re responsible for what you store inside, how you lock your office door, and who gets a key. If someone walks off with sensitive files because you left the door open, it’s not the landlord’s fault.

This shared model means businesses must stay proactive. Relying solely on the provider leaves dangerous gaps. You need strong authentication, regular code reviews, and ongoing monitoring of your applications.

Ultimately, PaaS speeds up development and reduces operational overhead, but it doesn’t eliminate security duties. Understanding where your responsibilities begin—and acting on them—is essential to staying protected in the cloud.