5 Authentication Patterns Every Web Developer Should Know in 2026

Web authentication has evolved dramatically. What used to be "just hash the password and store a session" now spans half a dozen distinct patterns, each with real trade-offs. After building auth systems across multiple projects, here's my breakdown of the five patterns that matter most in 2026. 1. Session-Based Authentication The OG. Server creates a session, stores it (usually in Redis or a database), and hands the client a cookie. // Express.js session setup import session from ' express-session ' ; import RedisStore from ' connect-redis ' ; import { createClient } from ' redis ' ; const redisClient = createClient ({ url : ' redis://localhost:6379 ' }); await redisClient . connect (); app . use ( session ({ store : new RedisStore ({ client : redisClient }), secret : process . env . SESSION_SECRET , resave : false , saveUninitialized : false , cookie : { secure : true , httpOnly : true , sameSite : ' lax ' , maxAge : 24 * 60 * 60 * 1000 // 24 hours } })); Pros: Simple mental model, ea