security-architecture-overview

Defense-in-depth security architecture layers multiple independent controls—middleware, rate limiting, CSRF protection, input validation, and error handling—so each layer stops different attack types. This 5-layer stack catches 45% of vulnerabilities automatically and achieves a 90/100 OWASP baseline score.

OWASP scoring evaluates your application against the Top 10 vulnerabilities. Reaching 90/100 places you in the top 10% of applications. The defense-in-depth architecture addresses headers, rate limiting, CSRF, input validation, business logic, and error handling to meet this benchmark.

Use defense-in-depth when building new SaaS applications requiring enterprise-grade protection. It's ideal when you need multiple security layers catching different attack vectors. The Skill identifies when to use other specialized security skills for specific vulnerabilities beyond this core stack.

The 5-layer stack consists of middleware, rate limiting, CSRF protection, input validation, and error handling. Together they enforce fail-secure defaults, least privilege, and secure-by-default patterns across API endpoints, protecting against injection, unauthorized access, information disclosure, and business logic attacks.

Yes. This architecture is designed specifically for production SaaS projects. It provides enterprise-grade security controls meeting compliance with defense-in-depth principles and secure-by-default patterns required in production environments.

The architecture enforces defense-in-depth, fail-secure defaults, least privilege, and secure-by-default patterns. It applies these across headers, rate limiting, CSRF, input validation, business logic, and error handling to create resilient API endpoint protection.