Advanced Cybersecurity — Threat Models, Zero Trust, Detection, and Incident Response
A technical guide: modelling adversaries, designing zero-trust networks, telemetry & detection strategies (SIEM/XDR), and operational incident response processes.
Security operations and defense-in-depth illustration (stock photo)
Threat Modeling
Systematically identify assets, entry points, trust boundaries, and likely adversary capabilities. Techniques: STRIDE, DREAD, and attack-surface analysis. Threat models inform mitigation priorities and logging requirements.
Zero Trust Architecture
Zero trust enforces never trust, always verify with strong identity, device posture checks, microsegmentation, policy-based access, continuous authentication, and encrypted transport (mTLS).
Detection & Telemetry
Collect high-fidelity telemetry: endpoint EDR events, network flows (NetFlow/IPFIX), process trees, DNS logs, and cloud audit trails. SIEM/XDR correlates events with detection rules and ML-based anomaly detection. Playbooks and SOAR automate triage.
Incident Response
IR lifecycle: preparation, identification, containment, eradication, recovery, and post-incident review. Forensic readiness (WORM logs, chain-of-custody) and tabletop exercises are essential. Purple teaming aligns red/blue to improve detection.
References
- NIST SP 800-series, MITRE ATT&CK framework, SANS incident response materials.
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