Beginner LevelWeb Security & Cyber Defense
What is Defense in Depth and why is multi-layered security critical?
❓ Interview Prompt: Explain Defense in Depth architectural strategy, redundant security controls, and assuming individual layer failure.
Defense in Depth is a security principle postulating that no single security control is foolproof. Security must be implemented in multiple redundant layers:
5 Architectural Layers:
1
Perimeter / Network: WAF, DDoS protection, Firewall rules.
2
Host / Infrastructure: OS patches, unprivileged container users.
3
Application: Authentication, authorization checks, input validation.
4
Data: Encryption at rest (AES-256) and in transit (TLS 1.3).
5
Monitoring: SIEM log auditing and automated anomaly detection.
Code Implementation Example
json
{
"architecture": "Defense in Depth",
"layers": [
"Cloudflare WAF",
"API Gateway Rate Limiting",
"OAuth 2.0 / JWT Auth",
"Zod Input Schema Validation",
"PostgreSQL Parameterized Queries",
"KMS AES-256 Database Encryption"
]
}💡Multi-layered Defense in Depth security architecture.
🎯 Interview Key Takeaway
Implement Defense in Depth so that if one security layer is breached, subsequent layers stop the attack.
#Defense in Depth#Architecture#Security Principles#Beginner
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