Cloud Security & Zero-Trust

Perimeter security does not work in cloud environments. Zero-trust does.

Traditional network security was built around a perimeter: trust everything inside, distrust everything outside. Cloud destroyed that model. Your workloads run in shared infrastructure, your users authenticate from anywhere, your services call each other across account boundaries, and your supply chain has deep access to your systems. The perimeter is gone. Zero-trust replaces it with a simple principle: never trust, always verify - regardless of where a request originates. Node designs and implements zero-trust security architectures that work for real cloud environments, at real operational scale.

Why cloud security requires a different approach

Cloud environments introduce security challenges that traditional approaches do not address. Attack surfaces expand automatically as new services are provisioned. Misconfiguration is the primary cause of cloud breaches - not sophisticated exploits, but S3 buckets left public, overpermissioned IAM roles, security groups with unrestricted access, and logging disabled. The velocity of cloud deployment means misconfigurations can appear and be exploited within minutes.

At the same time, the regulatory environment is tightening. GDPR, NIS2, DORA and sector-specific regulations impose increasingly specific requirements around how cloud environments must be secured, monitored and evidenced. The gap between what organisations believe their security posture to be and what it actually is has never been larger.

Zero-trust is not a product. It is a security architecture model with specific technical implementations. We design those implementations for your environment, integrate them into your operations, and manage them on an ongoing basis.

Zero-trust architecture design

Zero-trust is built on five principles: verify explicitly, use least privilege access, assume breach, inspect and log all traffic, and segment to limit blast radius. We implement each of these in cloud environments using the appropriate controls for your providers and workload types.

Identity as the control plane - in a zero-trust model, identity replaces network location as the primary security boundary. Every user, service and device is verified before access is granted, regardless of network position. We implement identity-first access controls using your existing identity provider (Entra ID, Okta, Keycloak) extended with conditional access policies, continuous authentication and risk-based access controls.

Micro-segmentation - rather than flat networks where any service can reach any other service, we implement micro-segmentation that restricts lateral movement at the workload level. Each service communicates only with the specific services it legitimately needs to reach, over explicitly defined network paths. Compromise of one service cannot be used as a pivot point to reach others.

Mutual TLS for service communication - all service-to-service communication is encrypted and mutually authenticated using service mesh technology (Istio, Linkerd or provider-native service mesh). Services verify each other's identity with certificates, not network addresses.

Continuous session verification - access is not granted once and then assumed. Sessions are continuously evaluated against current context - device health, user behaviour, location risk and threat intelligence. Anomalous behaviour triggers re-authentication or access termination without user intervention.

Cloud Security Posture Management (CSPM)

Continuous assessment of your cloud configuration against security benchmarks and your own policies.

Real-time misconfiguration detection - automated scanning of all cloud resources against CIS Benchmarks, vendor security best practices and your custom policies. New resources are assessed immediately on creation. Configuration drift from a secure baseline is detected within minutes, not discovered in quarterly reviews.

Risk prioritisation - not all misconfigurations are equal. We contextualise findings with exploitability, data sensitivity, internet exposure and business criticality to produce a prioritised remediation queue. Your team works on what matters most, not an undifferentiated list of hundreds of findings.

Automated remediation - common, low-risk misconfigurations are remediated automatically within defined policies. An S3 bucket that becomes public is made private immediately. A security group with unrestricted access is flagged and corrected without waiting for a human review cycle.

Compliance mapping - CSPM findings are mapped to the specific controls required by ISO 27001, SOC 2, PCI DSS, Cyber Essentials Plus and GDPR. Compliance reporting becomes a real-time view of control status rather than a periodic manual exercise.

Identity-first security model

Identity misconfiguration is the leading cause of cloud breaches. Over-permissioned roles, unused credentials, service accounts with administrative access, and missing MFA all create exploitable weaknesses that threat actors actively hunt for.

IAM security assessment - we audit every identity and access management configuration across your cloud accounts: role permissions, policy scope, service account usage, credential age, MFA coverage and federation settings. We produce a prioritised remediation plan and implement the changes.

Privileged access governance - administrative access requires just-in-time elevation with approval workflows, time-limited sessions and comprehensive logging. No human identity has permanent administrative access to production systems.

Non-human identity management - service accounts, API keys, deployment credentials and CI/CD pipeline identities are inventoried, assessed and governed. Long-lived static credentials are replaced with dynamic, short-lived credentials using workload identity federation and secrets management platforms (HashiCorp Vault, AWS Secrets Manager, Azure Key Vault).

Credential detection and response - automated scanning of code repositories, build artifacts and container images for accidentally committed credentials. Integration with secrets scanning in CI/CD pipelines prevents credentials reaching production. Leaked credentials trigger automated rotation and incident response.

DevSecOps pipeline integration

Security controls that exist outside the development process are bypassed by the development process. DevSecOps embeds security at every stage of the delivery pipeline.

Shift-left security scanning - static application security testing (SAST), software composition analysis (SCA) for open source dependencies, infrastructure as code scanning (Checkov, tfsec), and container image scanning are all integrated into CI pipelines. Security issues are identified before code is merged, not after it reaches production.

Policy as code enforcement - Open Policy Agent policies are evaluated in the CI/CD pipeline before infrastructure changes are applied. A Terraform plan that violates security policy cannot be applied. Developers receive clear, actionable feedback about what policy is violated and how to fix it.

Container and image security - base images are scanned for vulnerabilities and regularly updated. Runtime container security monitors for anomalous process execution, unexpected network connections and filesystem modifications. Supply chain security controls (SBOM generation, image signing and verification) ensure that only verified images run in production.

Secrets management in pipelines - CI/CD pipelines authenticate to cloud environments using short-lived credentials retrieved from a secrets management platform, never using long-lived API keys stored in pipeline environment variables.

Data encryption and key management

Data encryption is necessary but not sufficient - key management is where the real security lies.

Encryption at rest and in transit - all data is encrypted at rest using customer-managed keys (CMKs) for sensitive data classifications. All data in transit is encrypted using TLS 1.2 or higher with validated certificate chains. We implement and verify these controls rather than relying on cloud provider defaults.

Key management strategy - we design a key management architecture that separates key custody from data custody, implements key rotation policies, provides audit logs of all key usage, and enables key revocation in the event of a breach. Where regulatory requirements mandate it, we implement hardware security modules (HSMs) or Bring Your Own Key (BYOK) arrangements.

Data classification and control - security controls should be proportional to data sensitivity. We implement data classification frameworks that automatically apply appropriate encryption, access control and audit logging to data based on its classification.