Mastering JWT Authentication: Security, Refresh Tokens & Best Practices скачать в хорошем качестве

Mastering JWT Authentication: Security, Refresh Tokens & Best Practices

In this video, we dive deep into JSON Web Tokens (JWT) to build a secure, stateless authentication system. Whether you are building an API with Node.js or securing a frontend application, understanding how to handle tokens correctly is critical to preventing vulnerabilities like XSS and signature bypass. 📝 What we cover in this video: 🔹 What is a JWT? We break down the open standard (RFC 7519) structure: the Header, Payload, and Signature. Learn how these compact, URL-safe tokens securely transmit information between parties without maintaining session state on the server. 🔹 Implementation Guide (Node.js & Express) I’ll walk you through setting up a backend using Node.js, Express, and MongoDB. We will cover: • Generating Access Tokens (short-lived) and Refresh Tokens (long-lived). • Implementing "Refresh Token Rotation" to prevent replay attacks. • Validating claims like Issuer (iss), Expiration (exp), and Audience (aud). 🔹 Where should you store JWTs? The debate is over. We compare Local Storage vs. HttpOnly Cookies. • Local Storage: Vulnerable to XSS (Cross-Site Scripting) attacks. • HttpOnly Cookies: inaccessible to JavaScript, making them the secure choice for production. 🔹 Security Vulnerabilities & How to Prevent Them We demonstrate common hacks and how to patch them, including: • The "None" Algorithm Attack: Preventing attackers from stripping signatures. • Algorithm Confusion: Ensuring your server doesn't mistake a public key for an HMAC secret. • Weak Secrets: Why you need a 256-bit strong key. • Sensitive Data: Why you should NEVER put passwords or private data in the payload. 🔹 Token Invalidation Strategies Since JWTs are stateless, how do you log a user out? We discuss strategies like "Blacklisting" tokens or using an "Issued At" (iat) allowlist to invalidate tokens globally or per user without massive database lookups. -------------------------------------------------------------------------------- 🔗 Resources & Tools Mentioned: • JWT Debugger (Decode and Verify tokens): https://jwt.io/ • Official JWT RFC 7519 Standard: https://tools.ietf.org/html/rfc7519 #JWT #WebSecurity #NodeJS #Authentication #WebDevelopment #Programming #API #MERNStack