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Threat Model & Security Review Pack

Production-grade zero-trust threat modeling specification covering STRIDE vectors, DFD trust boundaries, quantitative DREAD scoring, and OWASP ASVS verification.

TEMPLATE // INSPECT: TPL-SEC-001MODIFIED: 2026-09-17
CATEGORYSecurity, Privacy & Compliance
VERSIONv1.0.0
RISK LEVELCRITICAL
ARTIFACT CLASSDOC
FORMATSdocx, pdf, md, mermaid, svg
AI & EXECUTIVE SUMMARY

Zero-trust STRIDE threat modeling specification and financial gateway worked example. Covers Level 1 DFD trust boundaries, threat enumeration, DREAD scoring, KMS envelope encryption, and automated CI/CD security gates.

Important Tech Document Template & Operational Notice

TinyCTO.tv Tech Document Template Notice: This template is a general educational and operational starting point. It is not legal, tax, accounting, investment, procurement, regulatory, security or certification advice. Requirements vary by jurisdiction, organization, contract and risk. Review and adapt it with qualified professionals before relying on it.

Problem Solved

Identifies and eliminates critical security vulnerabilities during design phase before code deployment, dramatically lowering breach risk and satisfying regulatory audits.

When to Use

  • Before releasing any system handling financial transactions, payment instruments, or sensitive PII.
  • When architecting new public API gateways, authentication meshes, or cross-cloud integrations.
  • As mandatory documentation for PCI-DSS, SOC 2 Type II, or ISO 27001 certification.

When NOT to Use

  • For purely static websites with zero user input, authentication, or backend data persistence.

5 Template Sections & Structural Outline

1. 1. Scope, System Architecture & Assets at Riskstandard, enterprise, regulated

System boundaries and high-value technical assets.

Guidance:Catalog cryptographic keys, secrets, and ledger databases at risk.
2. 2. Data Flow Diagram (DFD) & Trust Boundariesstandard, enterprise, regulated

Trust zones and network boundary crossing controls.

Guidance:Map ingress WAF, mTLS mesh, and private database subnets.
4. 4. STRIDE Threat Analysis (Spoofing to Elevation of Privilege)standard, enterprise, regulated

Complete vector breakdown across all six STRIDE dimensions.

Guidance:Identify concrete technical scenarios and current mitigations.
10. 10. DREAD Risk Scoring & Prioritization Matrixstandard, enterprise, regulated

Quantitative risk formula scoring Damage, Reproducibility, Exploitability.

Guidance:Prioritize Critical and High severity risks into engineering sprints.
12. 12. Verification & Validation Protocolenterprise, regulated

Automated SAST, DAST, SCA, and penetration testing cadence.

Guidance:Define strict blocking criteria for CI/CD pull request builds.

Completion Instructions

1. Map trust boundaries and data flow with AppSec leads. 2. Enumerate assets and evaluate each against STRIDE categories. 3. Calculate DREAD scores for all identified threats. 4. Design defense-in-depth mitigations (mTLS, KMS, rate limiting). 5. Configure CI/CD automated gates and obtain CISO attestation.

Independent Review Checklist

  • Are all external ingress points guarded by TLS 1.3, WAF, and rate limiting?
  • Is mTLS with SPIFFE X.509 certificates enforced across internal services?
  • Are sensitive database columns encrypted with customer-managed KMS keys?
  • Do automated SAST and container vulnerability scans block release pipelines on Criticals?
WORKED SCENARIO SHOWCASE

ApexCore Payments & API Gateway STRIDE Threat Model

Fictional Entity: ApexCore Payment Processing Engine

Zero-trust threat analysis of a Tier-0 payment gateway handling cardholder data under PCI-DSS Level 1 compliance.

Key Highlights & Outputs:
  • Zero plain-text cardholder data exposure across all messaging and database tiers.
  • Enforced envelope encryption with AWS KMS CMK 90-day automatic key rotation.
  • Eliminated DB connection starvation vulnerability identified in postmortem INC-2026-0408.

Frequently Asked Questions

How does STRIDE integrate with OWASP ASVS?

STRIDE is a threat identification framework used to discover what can go wrong during design. OWASP ASVS (Application Security Verification Standard) provides the concrete security control checklist used to verify that those threats are mitigated.

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Complete Tech Document Pack (.zip)
12 Files

Download all blank templates, worked scenarios, and verification manifests in a single verified archive.

Individual Artifacts (.zip)
TPL-SEC-001-Threat-Model-and-Security-Review-Blank-EN.docxdocx
all14.4 KB
TPL-SEC-001-Threat-Model-and-Security-Review-Blank-EN.pdfpdf
all262.5 KB
TPL-SEC-001-Threat-Model-and-Security-Review-Example-EN.docxdocx
all15.0 KB
TPL-SEC-001-Threat-Model-and-Security-Review-Example-EN.pdfpdf
all260.3 KB
TPL-SEC-001-Threat-Model-and-Security-Review-Template-EN.mdmd
all7.6 KB
TPL-SEC-001-Threat-Model-and-Security-Review-Example-EN.mdmd
all8.7 KB
TPL-SEC-001-Tehdit-Modeli-ve-Guvenlik-Degerlendirmesi-Bos-TR.docxdocx
all14.5 KB
TPL-SEC-001-Tehdit-Modeli-ve-Guvenlik-Degerlendirmesi-Bos-TR.pdfpdf
all269.4 KB
TPL-SEC-001-Tehdit-Modeli-ve-Guvenlik-Degerlendirmesi-Ornek-TR.docxdocx
all15.4 KB
TPL-SEC-001-Tehdit-Modeli-ve-Guvenlik-Degerlendirmesi-Ornek-TR.pdfpdf
all269.3 KB
TPL-SEC-001-Tehdit-Modeli-ve-Guvenlik-Degerlendirmesi-Sablonu-TR.mdmd
all7.9 KB
TPL-SEC-001-Tehdit-Modeli-ve-Guvenlik-Degerlendirmesi-Ornegi-TR.mdmd
all9.3 KB
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