This course answers a practical security question. Which principal may perform which action on which AWS resource, and which boundary decides? We will build a repeatable baseline for preventing misuse, detecting evidence, and responding without confusing AWS responsibilities with customer responsibilities.
The shared responsibility model separates security of the cloud from security in the cloud. AWS protects the facilities, hardware, networking, and virtualization infrastructure that operate AWS services. Customers protect workloads, data, identities, configurations, and applicable compliance obligations.
The selected service changes the customer workload. With Amazon Elastic Compute Cloud, customers manage guest operating system patching, application software, and security group configuration. With Amazon Simple Storage Service, AWS operates the infrastructure and platform. Customers still classify data, select encryption options, and apply access permissions.
Reusable rule Assign every control to the layer that can actually change the risk. Managed infrastructure does not remove customer configuration responsibility.
An AWS account is an isolation boundary for resources, billing, and many permissions. A Region is a geographic deployment boundary. Identity and Access Management (IAM) evaluates the principal, requested action, target resource, and relevant conditions before AWS authorizes a request.
A baseline starts by recording which accounts own production data, which Regions contain it, and which identities can reach it. Temporary credentials and least privilege reduce the impact of credential exposure. Network placement and encryption then constrain the routes and data operations that identities may use.
Let’s inspect how account, Region, identity, and resource boundaries contain a request.
A security baseline is the minimum set of controls that establishes accountable access, protected data, recorded activity, and prepared response. Preventive controls restrict an unsafe request before it succeeds. Detective controls produce evidence of suspicious behavior or configuration drift. Response controls contain and recover from confirmed events.
IAM permissions provide an identity foundation. Network controls limit permitted paths. Encryption and access controls protect data at rest and in transit. Logging and detection create traceability. No single layer proves the workload is secure, so each layer should address a distinct failure mode.
Let’s inspect the control layers that connect prevention, detection, and response.