Cloud sprawl has become a fact of life for most organizations. As workloads move from on-premises servers to multiple public cloud platforms, the boundaries of the traditional security perimeter begin to disappear, creating new challenges around visibility, control, and cloud security.
Protecting this increasingly borderless hybrid cloud environment requires moving security controls to where they are actually needed, applying them with the right tools, and building the overall strategy around five core principles: unified access management, automation, shifting left, data security, and Zero Trust.
Principle 1: Build a unified access management strategy
In cloud environments, the traditional perimeter extends far beyond the corporate data center. Identity therefore becomes one of the main boundaries of trust, replacing the network-centric model that organizations relied on for years.
A unified identity and access management strategy is essential for protecting hybrid cloud environments.
Key areas to consider include:
- A unified identity and privileged access management strategy (PAM) to prevent cloud identities from being compromised or spreading uncontrolled across environments.
- Multi-factor authentication (MFA) for all access wherever possible, or at minimum for privileged accounts.
- Automated tools for monitoring cloud accounts, both for security events through SIEM and for auditing configurations, permissions, and privileges.
Principle 2: Automate configuration and security checks across clouds
Throughout my experience, I have found that a large share of cloud security incidents originate from misconfigurations or customer-side mistakes rather than sophisticated attacker activity.
In cloud environments, configuring infrastructure securely is just as important as writing secure code.
Some of the most important steps for reducing configuration errors include:
- Use at least a CSPM solution to maintain secure configurations across cloud environments. Most major cloud providers offer their own native CSPM capabilities.
- Use a unified security platform to collect and analyze information across environments, such as Wazuh. Cloud security automation is becoming an increasingly important part of modern security strategies.
Principle 3: Apply DevSecOps and shift security controls left
Developers and security teams often look at cloud security from very different perspectives.
Developers tend to think about technical controls, open source components, new functionality, containers, and deployment. Security teams are more focused on risk: what controls exist, what they protect against, how they can be automated, and how their effectiveness can be verified.
This is why security controls should not be designed independently by cloud development teams. Security teams need to apply DevSecOps practices and make sure the necessary controls are introduced as early as possible in the development process.
Cloud security should not become a separate organization with its own isolated tools and processes. Development, engineering, and security teams need to work within a common strategy and use tools that allow them to speak the same language.
To shift security left:
- Scan infrastructure and software components for vulnerabilities within the development pipeline using Software Composition Analysis (SCA) tools such as Invicti SCA.
- Standardize Dynamic Application Security Testing (DAST). Move testing earlier in the process so security checks can scale when applications need to be deployed across multiple cloud environments.
Principle 4: Strengthen data security
Organizations need a reliable way to discover and classify confidential and sensitive data.
A data classification solution can help automate audits of document repositories, identify sensitive information, and prepare the organization for the introduction of Data Loss Prevention (DLP).
However, data protection should not stop at cloud configuration or CSPM controls. Corporate endpoints also need attention because employees use them to access and work with cloud data every day.
DLP should cover the full range of potential data leakage paths, both in cloud environments and on endpoints.
Solutions such as Netwrix Data Classification and Netwrix Endpoint Protector can support this approach.
Principle 5: Use Zero Trust to unify the security strategy
The term Zero Trust is often overused, but the core idea remains useful: there should be no implicit trust.
Authentication alone should not be enough. Organizations need visibility into what users and other identities do after authentication and throughout the entire lifecycle of a session.
This is particularly important in cloud environments, but Zero Trust principles should also extend to private cloud infrastructure.
To get the most value from Zero Trust:
- Apply Zero Trust principles across both public and private cloud environments wherever possible.
- Gradually move away from the concept of trusted networks. Zero Trust can become a driver for broader security transformation and help make applications more secure across hybrid cloud environments.
Conclusion
As public cloud adoption continues, security strategies have to evolve with it.
It is also important to consolidate tools that have traditionally operated separately. Too many disconnected controls can slow teams down while still leaving gaps because there is no unified view across the cloud environment.
Working across development, engineering, and security teams is not always easy. But security leaders need to adapt to the shift toward cloud infrastructure and Zero Trust rather than trying to recreate the old perimeter in a new environment.
Using these five principles as a foundation can make hybrid cloud applications easier to secure, easier to manage, and better suited to the way modern infrastructure actually works.
