Security Architecture

Attribute	Value
Project	[Project Name]
Version	0.1
Status	Draft

Security Objectives and Scope
Security Architecture Overview
Authentication Strategy
Authorization Model
Data Protection
OWASP Top 10 Compliance Mapping
Network Security Architecture
Secrets Management Strategy
Security Headers and Web Best Practices
Input Validation and Sanitization
API Security
Security Monitoring and Incident Response
Secure Development and Security Testing Approach
ADR and Diagram References
Source References

Security Objectives and Scope

[Objective 1, e.g. protect user data from unauthorized access.]
[Objective 2, e.g. maintain availability under load and abuse.]
[Scope: what is in and out of bounds for this document.]

Security Architecture Overview

[Provide a high-level view of how security layers compose. A mermaid diagram showing the defense-in-depth layers works well here.]

Authentication Strategy

Selected Model

[State the chosen authentication mechanism (e.g. JWT access + refresh tokens, session cookies, OAuth 2.0, SSO).]

Authentication Endpoints

Endpoint	Method	Purpose
`/api/v1/auth/login`	POST	[Description]
`/api/v1/auth/register`	POST	[Description]
`/api/v1/auth/refresh`	POST	[Description]
`/api/v1/auth/logout`	POST	[Description]

Authentication Controls

[Rate limiting on login attempts.]
[Password complexity requirements.]
[Email verification flow.]
[Token lifetime and revocation rules.]

Token Structure

{
  "sub": "user_id",
  "role": "string",
  "iat": 1234567890,
  "exp": 1234571490
}

Adjust claims to match your authorization model. Document any custom claims.

Authorization Model

RBAC + Resource Attributes

[Describe the role hierarchy and how resource-level ownership is enforced.]

Least-Privilege Rules

[Rule 1, e.g. role X cannot access resources owned by role Y.]
[Rule 2, e.g. all requests are denied by default.]

Authorization Flow

Data Protection

Encryption at Rest

[Which columns/fields are encrypted.]
[Key management approach.]

Encryption in Transit

[TLS version and cipher requirements.]
[Internal service communication.]

Sensitive Data Handling

[Which fields are classified as sensitive.]
[Logging redaction rules.]
[Deletion behavior per privacy NFR.]

OWASP Top 10 Compliance Mapping

OWASP Category	Controls in Place	Status
A01: Broken Access Control	[Controls]	[Draft/Implemented]
A02: Cryptographic Failures	[Controls]	[Draft/Implemented]
A03: Injection	[Controls]	[Draft/Implemented]
A04: Insecure Design	[Controls]	[Draft/Implemented]
A05: Security Misconfiguration	[Controls]	[Draft/Implemented]
A06: Vulnerable Components	[Controls]	[Draft/Implemented]
A07: Auth Failures	[Controls]	[Draft/Implemented]
A08: Data Integrity Failures	[Controls]	[Draft/Implemented]
A09: Logging Failures	[Controls]	[Draft/Implemented]
A10: SSRF	[Controls]	[Draft/Implemented]

Network Security Architecture

[VPC / subnet layout.]
[Ingress/egress rules.]
[WAF or DDoS protection.]

Secrets Management Strategy

Secret Type	Storage	Rotation	Access
Database credentials	[Platform secrets manager]	[On compromise / schedule]	[Least-privilege]
API keys	[Platform secrets manager]	[Per-policy]	[Service account]
JWT signing key	[Platform secrets manager]	[On schedule]	[Backend only]

Security Headers and Web Best Practices

Header	Value	Purpose
`Strict-Transport-Security`	`max-age=31536000; includeSubDomains`	Force HTTPS
`X-Content-Type-Options`	`nosniff`	Prevent MIME sniffing
`X-Frame-Options`	`DENY`	Prevent clickjacking
`Content-Security-Policy`	[CSP directives]	Restrict resource origins
`Referrer-Policy`	`strict-origin-when-cross-origin`	Limit referrer leakage

Input Validation and Sanitization

[Schema validation on all request bodies (e.g. Pydantic, Zod, JSON Schema).]
[SQL parameterization / ORM usage — no raw queries.]
[XSS prevention via output encoding.]
[File upload validation: type, size, content inspection.]

API Security

[All endpoints require authentication unless explicitly public.]
[Rate limiting per endpoint class (see API Design Standards).]
[CORS policy: allowed origins, credentials, headers.]
[Idempotency for non-GET mutations where appropriate.]

Security Monitoring and Incident Response

Monitoring

[Auth failures and brute-force attempts are logged and alerted.]
[Dependency vulnerability scanning in CI.]
[Runtime dependency alerts (Dependabot, Snyk, etc.).]

Incident Response Lifecycle

Detect — alert fires or user report received
Triage — assess severity and scope
Contain — revoke access, block IPs, disable compromised accounts
Eradicate — patch the vulnerability
Recover — redeploy from clean state
Review — post-incident report within [N] business days

Table of Contents​

Security Objectives and Scope​

Security Architecture Overview​

Authentication Strategy​

Selected Model​

Authentication Endpoints​

Authentication Controls​

Token Structure​

Authorization Model​

RBAC + Resource Attributes​

Least-Privilege Rules​

Authorization Flow​

Data Protection​

Encryption at Rest​

Encryption in Transit​

Sensitive Data Handling​

OWASP Top 10 Compliance Mapping​

Network Security Architecture​

Secrets Management Strategy​

Security Headers and Web Best Practices​

Input Validation and Sanitization​

API Security​

Security Monitoring and Incident Response​

Monitoring​

Incident Response Lifecycle​

Secure Development and Security Testing Approach​

ADR and Diagram References​

Source References​

Table of Contents