I thought adding a 'Login with Google' button would be easy. Instead, I faced Redirect URI errors, State parameters, and HTTPS issues. I share the 4-step 'dance' of OAuth 2.0, practical solutions with NextAuth.js, and how to handle mobile deep linking.
A comprehensive deep dive into client-side storage. From Cookies to IndexedDB and the Cache API. We explore security best practices for JWT storage (XSS vs CSRF), performance implications of synchronous APIs, and how to build offline-first applications using Service Workers.
App crashes only in Release mode? It's likely ProGuard/R8. Learn how to debug obfuscated stack traces, use `@Keep` annotations, and analyze `usage.txt`.
Bitcoin is just part of it. How to create trust without a central authority, principles of decentralization, smart contracts, gas fees, Layer 2 solutions, DAOs, and the Oracle Problem.
Why your server isn't hacked. From 'Packet Filtering' checking ports/IPs to AWS Security Groups. Evolution of Firewalls.
When the Access Token expires (usually after 1 hour), the user gets logged out. To prevent this, we use a Refresh Token. But if a Refresh Token is stolen, the hacker has permanent access.
Solution: Refresh Token Rotation.NextAuth.js and Supabase Auth handle this complex logic automatically. This is yet another reason why you should not build OAuth from scratch unless you enjoy reading IETF RFC documents for fun.
