One of the most common mistakes organizations make when moving to the Cloud is assuming that the provider takes care of all security issues. On the contrary, leading cloud providers like Microsoft Azure nurture a shared responsibility model.
Understanding exactly who secures what is critical for IT specialists, system administrators, and business leaders who want to reduce risk and meet compliance requirements.
What is the shared responsibility model?
In simple terms the Cloud providers are responsible for securing the infrastructure that runs the services and customers are responsible for protecting the data, applications, and configurations they use on top of that infrastructure.
The exact split depends on whether you’re using Infrastructure as a Service (IaaS), Platform as a Service (PaaS), or Software as a Service (SaaS).
How does it differ by service model?
- IaaS (Infrastructure as a Service) – in this case you manage operating systems, applications, and data. Provider secures the infrastructure.
- PaaS (Platform as a Service) – here the security of applications and data is your responsibility, and the vendor handles the OS and infrastructure.
- SaaS (Software as a Service) – if this is your service model all data, users, and access policies are your responsibility. The provider takes care of everything else.
It is good to know that the higher you go up the stack, the less you manage, but your duties never disappear. Thus, let’s dive into them.
Cloud provider responsibilities
No matter which model you choose, the provider always manages the security of the cloud itself. This includes:
- Physical data centers (facilities, hardware, and networking)
- Core infrastructure (compute, storage, and networking resources)
- Platform availability and resilience (redundancy, failover, uptime guarantees)
- Global compliance certifications (ISO, SOC, GDPR, HIPAA, etc.)
Moreover, providers like Microsoft invest billions into securing this layer, making it far stronger than most organizations could achieve alone. Say “goodbye” to all cyber protection worries.
Customer responsibilities
When it comes to cloud security, customers are responsible for configuring services and managing their data. This generally includes:
- Identity and access management (user accounts, roles, MFA, Conditional Access)
- Data classification and protection (encryption, backups, retention policies)
- Application security (patching, vulnerability management, secure coding practices)
- Endpoint security (laptops, mobile devices, and other access points)
- Monitoring and incident response (SIEM, SOC, logging, and alerting)
Misconfigurations like open storage buckets or weak access controls are one of the leading causes of cloud breaches, and these are part of customers’ responsibility list.
Bridging the gaps
The shared responsibility model often leaves gray areas. For example: who manages encryption keys, or how do you ensure compliance across hybrid setups? This is where working with a proven and experienced cloud security partner is essential.
At Isystems Cloud we help organizations:
- Design identity-first security strategies – we develop robust security plans that prioritize user identities and provide access controls to minimize risk across all systems and applications.
- Implement Zero Trust policies – we establish a “never trust, always verify” approach that continuously authenticates and authorizes users, devices, and applications.
- Deploy security monitoring and automation – we set up proactive monitoring, automated threat detection, and response workflows to reduce reaction times and prevent breaches.
- Align with compliance frameworks across hybrid and multi-cloud environments – we ensure your security practices meet regulatory requirements such as GDPR, NIS2, or ISO standards across on-premises, private, and public clouds.
- Conduct Penetration Testing (Pen Test) – we simulate real-world cyberattacks to identify vulnerabilities before attackers do, helping to strengthen your defenses and reduce risk.
Enhanced cloud security is built on collaborative partnership
Cloud security is a team effort and understanding the shared responsibility model is the first step toward protecting your data, your people, and your business. Are you ready? Contact us today.
