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6.3 Cloud Data Security

Data security and risk management in cloud span the shared responsibility model, encryption in transit and at rest, IAM, key management, and regulatory compliance.

6.3 Cloud Data Security and Risk Management

The shared responsibility model

IaaS PaaS SaaS YOU: OS, runtime, app, data, identity Provider: hardware, network YOU Provider OS+runtime + platform YOU Provider = Your responsibility = Provider responsibility Figure 6.3 - The line of responsibility shifts up the stack as you move from IaaS to SaaS.

Encryption everywhere

LayerStandard
In transitTLS 1.2+ between every hop
At restAES-256 on disks; provider or customer keys
In useConfidential computing (SGX, SEV)
Field-levelTokenisation for PII

IAM patterns

PracticeWhy
Least privilege everywhereLimit blast radius
No long-lived credentialsUse OIDC federation, IAM roles
MFA for humansReduce credential theft impact
Workload identity for servicesEliminate service-account secrets
JIT elevationTime-bound privileged access
Quarterly access reviewCatch drift

Compliance frameworks to map

FrameworkScope
ISO 27001General security controls
SOC 2 Type IIAnnual operating report
PCI DSSPayment cards
HIPAAUS health data
RA 10173Philippine Data Privacy Act
BSP circularsPhilippine banking sector
Mentor’s tip: Shared responsibility means most breaches are customer misconfigurations. Encrypt everywhere, kill long-lived credentials, classify data once and apply controls across every workload. Treat compliance as a side-effect of doing security well.

Test yourself

Q1. Zero Trust means:
Q2. Least-privilege access grants a user:
Q3. MFA reduces the risk of:
Q4. A security group in AWS behaves like:
Q5. Encryption at rest protects data:

Discussion

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