Misconfiguration is the leading cause of cloud data breaches (Gartner 2024). Public S3 buckets, overly permissive security groups, unauthenticated exposed services. IAM complexity grows with teams and services. Dynamic attack surface: cloud resources are created and deleted constantly — static inventories are obsolete by the next day.
Infrastructure & Cloud2 April 2026·7 min
Cloud Security: How to Protect Your Azure, AWS or GCP Infrastructure
Securing a cloud infrastructure is not just applying on-premise rules to cloud environments. The cloud introduces specific risks: shared responsibility, misconfiguration (the leading cause of cloud breaches), accidental data exposure, and identity management at scale.
01
Cloud-specific risks
02
The shared responsibility model
AWS, Azure and GCP secure physical infrastructure and hypervisors. Configuration, identity management, data encryption and application security are your responsibility. 95% of cloud security incidents are client-side errors, not provider-side (Gartner).
03
The 6 pillars of cloud security
1. Strict IAM: least privilege, no root access keys, credential rotation, quarterly permission reviews.
2. Default encryption: all volumes, databases, buckets. Keys via provider KMS or HSM.
3. Network segmentation: properly configured VPCs, private subnets for sensitive resources, restrictive Security Groups.
4. Continuous monitoring: CloudTrail/Activity Log/Cloud Audit Logs centralised with sensitive-action alerts.
5. Secure IaC: Terraform/CloudFormation scanning with Checkov/tfsec. Details on our cloud security page.
6. Secrets management: AWS Secrets Manager / Azure Key Vault / GCP Secret Manager. Never plaintext secrets in code.
04
Common cloud mistakes
Using root credentials for routine operations. SSH/RDP ports open to 0.0.0.0/0. Secrets in unencrypted environment variables. Never auditing IAM permissions. Unscanned Docker images. Ignoring Security Hub / Defender for Cloud alerts. No MFA on cloud accounts.
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What expert teams do
Mature teams practice Cloud Security Posture Management (CSPM) with continuous monitoring tools. All resources are tagged, inventoried and subject to automated compliance policies. IaC is always scanned before deployment. Secrets are managed via dedicated vaults. Unused permissions are automatically removed quarterly.
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Use cases
Enterprise Azure migration: IAM audit reveals 47 roles with unjustified admin rights. Reduced to 8 business roles — 80% attack surface reduction.
Multi-cloud startup: Terraform scan identifies 12 unauthenticated internet-facing resources before deployment. Pair with infrastructure pentest and cloud security training for DevOps teams.
Frequently Asked Questions
Is cloud more secure than on-premise?
Neither more nor less — it is differently risky. Cloud offers advanced native security features but introduces new risks (misconfiguration, IAM) that on-premise does not present the same way.
What is the shared responsibility model?
The cloud provider secures physical infrastructure. The customer is responsible for configuration, identities, data and applications. The boundary varies by service type (IaaS, PaaS, SaaS).
How to detect cloud misconfigurations?
CSPM tools: AWS Security Hub, Microsoft Defender for Cloud, Wiz, Orca. They scan continuously and alert on configuration drift.
Should data be encrypted in public cloud?
Yes, systematically. Even if the provider encrypts at infrastructure level, you must control application-level encryption and your own key management.
In summary
Cloud security is not a state — it is a continuous process. Cloud resources evolve constantly, and your security posture must evolve with them.
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