Comprehensive security middleware for REST APIs covering authentication, rate limiting, input validation, and attack prevention.

• Implements multiple security layers: helmet for HTTP headers, rate limiting, CORS configuration, input sanitization, and XSS/HPP protection
• Supports Node.js/Express and Python FastAPI with reference implementations for each framework
• Includes JWT-based authentication, input validation with sanitization, and security event logging
• Provides best practices guidance covering HTTPS enforcement, error handling, API versioning, and common vulnerability prevention