Security Architecture

Architecture patterns, defense in depth, secure design principles, and reference architectures.

Overview

Security architecture provides a structured approach to security design.

Architecture Patterns

Architecture Diagram

┌─────────────────────────────────────┐
│           Presentation              │
│  (Web, Mobile, API)                 │
├─────────────────────────────────────┤
│           Application               │
│  (Business Logic, Auth)             │
├─────────────────────────────────────┤
│           Data                      │
│  (Database, Cache, Storage)         │
├─────────────────────────────────────┤
│           Infrastructure            │
│  (Network, Servers, Containers)     │
└─────────────────────────────────────┘

Secure Design Principles

Principle	Description
Least Privilege	Minimum access needed
Defense in Depth	Multiple security layers
Fail Secure	Default to secure state
Separation of Duties	Split critical tasks
Complete Mediation	Check every access
Economy of Mechanism	Simple is better
Open Design	Don't rely on secrecy

Reference Architecture

security_architecture:
  perimeter:
    - firewall
    - waf
    - ddos_protection
  network:
    - segmentation
    - ids_ips
    - vpn
  application:
    - authentication
    - authorization
    - encryption
  data:
    - encryption_at_rest
    - encryption_in_transit
    - backup
  monitoring:
    - siem
    - logging
    - alerting

Network Security Zones

Architecture Diagram

┌─────────────────────────────────────┐
│           Untrusted                  │
│  (Internet)                         │
├─────────────────────────────────────┤
│           DMZ                       │
│  (Public services)                  │
├─────────────────────────────────────┤
│           Internal                  │
│  (Application servers)              │
├─────────────────────────────────────┤
│           Restricted                │
│  (Databases, sensitive data)        │
└─────────────────────────────────────┘

Practice

Design a secure architecture for a cloud-native application.

Security Architecture

Security Architecture

Overview

Architecture Patterns

Secure Design Principles

Reference Architecture

Network Security Zones

Practice

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