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Defense in Depth for Enterprise Systems

Layered security controls across network, identity, application, and data planes.

Defense in Depth for Enterprise Systems

Layers

[User] → WAF / CDN → LB → App → Service mesh → Data store
         ↑ IAM/MFA   ↑ SG/NACL  ↑ AuthZ   ↑ mTLS    ↑ Encryption

Control categories

  1. Preventive Firewalls, IAM deny, input validation
  2. Detective SIEM, IDS, anomaly detection
  3. Corrective IR playbooks, backup restore, patching

Metrics

  • Mean time to detect (MTTD) for simulated attacks
  • % systems with baseline CIS hardening
  • Patch SLA compliance by severity

Research conclusion

No single control is sufficient. Correlated layers reduce single-point failure when one control is bypassed.