Dive deep into path traversal protection techniques for TypeScript applications through hands-on implementations. Learn to prevent directory traversal attacks, encoded payload exploitation, unauthorized file access, and improper file path handling that compromise application security. Explore path normalization and validation strategies, directory restriction techniques, secure file access patterns, and best practices for file handling in Node.js environments. Develop skills to create resilient web applications that properly validate, sanitize, and control file access using TypeScript and Express.