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Description
A comprehensive Zero Trust-based cybersecurity solution designed for a telecom operator’s digital service portal, network infrastructure, and core systems. The solution enforces multi-layered security, secure identity, data governance, and threat protection while ensuring full alignment with GDPR, ISO 27001, and NIS2 regulations. It integrates DevSecOps principles across CI/CD pipelines and containerized workloads, delivering real-time visibility, automated policy enforcement, and proactive threat detection and response.
Actors
Security Architect – Designs and governs the Zero Trust model and compliance strategy.
DevOps Engineer – Integrates DevSecOps and security automation into CI/CD pipelines.
System Administrator – Manages infrastructure, user roles, and policy enforcement.
Regulatory Compliance Officer – Ensures adherence to GDPR, ISO 27001, and NIS2.
End Users (Telecom Customers) – Interact with the portal securely via verified identities.
Threat Detection System (Automated) – Monitors, logs, and alerts on anomalies or threats.
Preconditions
Telecom operator has an online customer-facing portal and internal operational network.
Need for strong security posture due to regulatory and business requirements.
Identity management system is in place but not fully Zero Trust–compliant.
Development and deployment pipelines are containerized (Docker/Kubernetes).
Compliance mandates from GDPR, ISO 27001, and NIS2 are active.
Flow of Events
System Hardening & Perimeter Security:
Azure Firewall and Microsoft Defender for Cloud are configured to enforce baseline protections.
Network segmentation, micro-perimeters, and rules established.
Identity & Access Control:
Azure AD B2C authenticates users and enforces conditional access policies.
Integration with Key Vault for managing credentials and secrets.
Data Protection & Governance:
Azure Purview classifies sensitive data and ensures data residency and access policies.
All customer and operational data encrypted in transit and at rest.
Threat Detection & Response:
Microsoft Sentinel collects logs and alerts from all security layers.
Behavioral analytics and automated playbooks respond to incidents.
DevSecOps Integration:
CI/CD pipelines secured with image scanning and policy enforcement.
Containerized workloads scanned and monitored continuously.
Secrets and keys managed via Azure Key Vault, integrated with pipelines.
Monitoring & Compliance:
Continuous assessment of system against ISO 27001 controls.
Real-time dashboards and audit trails for NIS2 compliance.
Postconditions
A fully operational and continuously monitored Zero Trust security architecture.
All users are authenticated and authorized through a central identity platform.
All sensitive data is governed and protected under defined policies.
Development pipelines are integrated with security checks and policy gates.
The solution meets or exceeds regulatory compliance standards.
Benefits
Security: Strong perimeter, endpoint, identity, and data protection.
Compliance: Conforms to GDPR, ISO 27001, and NIS2 without manual overhead.
Scalability: Modular security architecture adaptable to new services or regions.
Resilience: Real-time detection, auto-response, and minimal attack surface.
Productivity: Automated DevSecOps ensures faster yet safer deployments.
Tools & Technology Used
Microsoft Sentinel - SIEM & SOAR for centralized logging, alerting, and automated incident response
Microsoft Defender Suite - Endpoint, cloud, container, and identity protection
Azure AD B2C - Secure identity and access management for customers
Azure Key Vault - Secure secrets, keys, and certificates management
Azure Firewall - Network traffic filtering and segmentation
Azure Purview - Data classification, governance, and privacy controls
Azure DevOps / GitHub Actions - Secure CI/CD with integrated security scanning
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