Belajar Security Architect - Security Architecture Review Process

#Pendahuluan

Setelah di episode 11 kita mempelajari secure SDLC & DevSecOps, pada episode ini kita dalami security architecture review process — bagaimana melakukan review arsitektur secara terstruktur, mendokumentasikan keputusan (ADR), dan mengelola governance arsitektur. Review yang konsisten memastikan arsitektur tetap aligned dengan standar dan threat landscape.

Mengapa review process penting? Karena arsitektur tidak statis — threat berubah, technology berkembang, bisnis tumbuh. Review berkala memastikan arsitektur tetap relevan dan aman.

#Architecture Review Lifecycle

#When to Review

Trigger	Tipe
New project/project major change	Design review
Threat landscape change	Risk-based review
Compliance requirement change	Compliance review
Annual	Periodic review
Post-incident	Lessons learned review

#Review Process

100%

#Review Output

Output	Isi
Architecture review report	Temuan, rekomendasi, risk rating
Action items	Task, owner, deadline
Decision log	ADRs yang dihasilkan
Sign-off	Approval dari security

#Architecture Decision Records (ADRs)

ADR mendokumentasikan keputusan arsitektur penting — apa yang diputuskan, mengapa, dan konsekuensinya.

#ADR Template

ADR-001: Use Keycloak for Identity Provider

# ADR-001: Use Keycloak for Identity Provider
 
## Status: Accepted
## Date: 2026-08-16
 
## Context
Organization needs centralized identity management.
Current: scattered authentication per application.
 
## Decision
Adopt Keycloak as centralized IdP.
 
## Rationale
- Open-source, self-hosted
- SAML + OIDC support
- Active community
- Integration with existing stack
 
## Consequences
+ Centralized identity management
+ Better security posture
- Learning curve for team
- Infrastructure to maintain
 
## Alternatives Considered
- Okta (rejected: vendor lock-in, cost)
- Azure AD (rejected: Microsoft ecosystem too heavy)

#ADR Best Practices

Practice	Detail
One decision per ADR	Single responsibility
Immutable once accepted	Record, don't edit
Context-dependent	Document "why" not just "what"
Superseding	New ADR can replace old

Tip

ADRs adalah investasi jangka panjang. Mereka membantu tim baru memahami mengapa keputusan dibuat, dan membantu avoid repeating mistakes. Mulai dari keputusan terbesar, lalu berkembang ke semua keputusan arsitektur.

#Architecture Governance

#Governance Framework

Component	Fungsi
Architecture board	Decision authority
Standards	Documented standards
Compliance	Control monitoring
Metrics	Measuring adherence

#Governance Metrics

Metrik	Target
ADR documentation rate	100% major decisions
Standards adherence	> 95%
Review completion	100% new projects
Exception requests	< 5 per quarter

Note

Governance bukan birokrasi — ia adalah memastikan kualitas konsisten tanpa micromanagement. Standards yang jelas + review process yang efficient = governance yang effective.

#Penutup

Inti yang harus dibawa pulang:

Review triggers: new project, threat change, compliance, annual, post-incident.
ADRs: document what, why, and consequences.
Governance: board + standards + compliance + metrics.

Di episode 13 selanjutnya kita akan membahas security strategy & roadmap — align security dengan bisnis, funding, dan multi-year planning.