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What Are Cloud Security Best Practices?

What Are Cloud Security Best Practices?

Written by: Brenda Buckman
Published: 8/30/2025

Updated: 08/20/2026

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Here's a not-so-fun fact: the people trying to breach your environment are organized, well-funded, and getting better at their jobs every year. They're not lone hackers in dark basements. They're running operations with defined roles, real business models, and one very clear goal: finding the crack in your defenses before you do.

The good news? So are the people working to stop them.

With the right controls in place, you can stop reacting to threats and start building an environment that's genuinely hard to crack.

The best practices for cloud security in this list aren't theoretical. They reflect what the Huntress SOC sees organizations benefit from every single day. 

Key takeaways

  • Cloud security requires visibility across every layer: endpoints, identity, network, and logs

  • A managed SIEM removes the operational burden of log monitoring without sacrificing coverage

  • Endpoint protection can't just mean Windows — Linux and macOS are active attack targets too

  • Identity is the most exploited attack vector in cloud environments; ITDR is essential

  • Most cloud breaches trace back to misconfigurations, not sophisticated zero-days

  • Compliance and security aren't the same thing — but a managed SIEM helps you nail both

Understand the shared responsibility model

Cloud security refers to the combination of policies, controls, tools, and technologies designed to protect cloud-based data, applications, and infrastructure. Unlike traditional IT environments, cloud security introduces unique challenges, such as shared responsibility models, multi-cloud setups, and rapidly evolving attack vectors.

Here’s why sticking to cloud security best practices is a game-changer:

  • Reduced Risk of Breaches: Misconfigurations cause over 80% of cloud breaches.

  • Supports Compliance: Protect against non-compliance penalties tied to regulations like GDPR, HIPAA, and PCI DSS.

  • Builds Resilience: Rapid detection and automated responses enhance your ability to withstand cyber-attacks.

With that context in mind, it’s time to address what makes or breaks a secure cloud deployment.

Understanding the shared responsibility model

Cloud service providers (CSPs) like AWS, Azure, and GCP use a shared responsibility model, a framework that divides security responsibilities between the provider and the customer. Ignore it, and you risk catastrophic lapses in security.

Responsibilities under the shared model

  • Cloud providers secure the cloud infrastructure, including hardware, networking, and the virtualization layer.

  • Customers are secure within the cloud, which includes applications, data storage, user access, and configurations.

Different models for IaaS, PaaS, SaaS

  • IaaS (Infrastructure as a Service): Customers take responsibility for securing apps, data, virtual machines, and operating systems.

  • PaaS (Platform as a Service): Focus shifts to securing apps and data, while the provider manages the OS and infrastructure.

  • SaaS (Software as a Service): Security efforts center around access control and leveraging native CSP tools, as the platform is fully managed by the provider.

Failure to understand these distinctions can lead to incidents like the infamous AWS S3 bucket breaches, which were caused by customers leaving sensitive data publicly exposed.

Top cloud security best practices

Securing cloud environments isn’t just about solving misconfigurations or patching a few vulnerabilities. Instead, it requires a systematic, multi-domain approach. Below are actionable cloud security guidelines you can implement across key security domains.

1. Identity and access management (IAM)

  • Use Least Privilege Access: Restrict users to the minimum permissions they need to operate.

  • Implement Role-Based Access Control (RBAC) and Attribute-Based Access Control (ABAC) to fine-tune who can access what.

  • Enforce Multi-Factor Authentication (MFA) for an added layer of security.

  • Conduct regular reviews and rotation of IAM credentials to mitigate risk.

2. Data protection

  • Encrypt Data at rest and in transit using strong encryption standards (e.g., AES-256, TLS 1.3).

  • Use customer-managed encryption keys (CMEK) or a hardware security module (HSM) for better control over your encryption keys.

  • Consider tokenizing sensitive data to render it useless to unauthorized users.

3. Secure configuration and monitoring

  • Scan configurations regularly using tools like Terraform scanners or Cloud security posture management (CSPM) solutions.

  • Enforce baseline configurations using policy-as-code frameworks.

  • Implement continuous monitoring via SIEM.

4. Threat detection and response

  • Leverage cloud-native tools like AWS GuardDuty, Azure Defender, and GCP’s Security Command Center.

  • Set up real-time alerting for anomalies, including privileged activity.

5. Workload and application security

  • Apply DevSecOps pipelines to integrate security testing into CI/CD workflows.

  • Utilize container scanning tools (e.g., Trivy, Aqua Security) to identify vulnerabilities.

  • Harden VMs and containers with security benchmarks like CIS or NIST.

6. Network security

  • Implement Virtual Private Clouds (VPCs) and network segmentation to create isolated workloads.

  • Deploy firewalls, security groups, and Zero Trust Network Access (ZTNA) to limit infiltration.

  • Monitor traffic for lateral movement to spot potential breaches early.

7. Backup and recovery

  • Maintain encrypted, versioned backups as a failsafe against ransomware or data loss.

  • Test disaster recovery processes regularly to ensure functionality.

  • Store backups in isolated environments separate from production systems.

These best practices represent a minimum viable foundation. Proactive automation, timely reviews, and cloud-native integrations further enhance resilience.

Don’t skip compliance and governance

For enterprise-level cloud deployments, compliance is non-negotiable. It’s essential to map your cloud security controls to regulatory standards, such as:

  • GDPR for data privacy

  • HIPAA for healthcare compliance

  • PCI DSS for cardholder data security

  • FedRAMP for government data

Use automated audit logs and reporting tools (e.g., AWS Config, Azure Monitor) to maintain ongoing compliance.

Don’t forget to oversee third-party apps and SaaS products that connect to your cloud environment, as they can introduce vulnerabilities.

Cloud security best practices: The bottom line

Cloud

Cloud security is an overlapping set of controls across endpoints, identity, network, infrastructure, and data. No single tool solves all of it — but the right combination of managed EDR, SIEM, and ITDR, backed by a SOC that actually does the work, gets you close.

Security done right doesn't just reduce risk. It means you can build, hire, and grow without holding your breath every time you ship something new.

Start with visibility. Cover every endpoint and identity system. Automate what you can. And test everything.

Ready to see how Huntress fits into your cloud security strategy? Start a free trial or book a demo.

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