Building Scalable Fullstack Authentication: JWT, Refresh Tokens, and Session Security
Kowshik Valipireddy
Full Stack Developer & AI Engineer
Authentication is the foundational bedrock of web application security. Storing JWTs inside HttpOnly, Secure cookies protects against XSS attacks.
1. LocalStorage vs HttpOnly Cookies
Storing tokens in localStorage leaves sessions vulnerable to third-party script extraction. HttpOnly cookies block client JS access completely.
2. Implementing Refresh Token Rotation
Issuing a new refresh token upon each renewal invalidates the entire token family if a stolen token is reused.
3. Protecting Routes with Next.js Middleware
Next.js Edge Middleware inspects cookie headers and handles unauthorized redirects with sub-millisecond edge latency.
Related Topics & Technologies
Kowshik Valipireddy
AuthorFull Stack Developer & AI Engineer
Full Stack Developer specializing in React, Next.js, Node.js, and AI workflows. Passionate about building fast, accessible, and SEO-optimized web experiences.
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