Sessions vs JWT vs Cookies: Understanding Authentication Approaches

Short summary

Sessions store user authentication state server-side, retrieved by session ID in cookies—simple logout but requires shared server state to scale. JWT embeds authentication data in a signed token, eliminating server storage and enabling horizontal scaling, but logout requires a blacklist or short expiration. Cookies transport either approach. Choose sessions for monolithic apps, JWT for distributed systems and mobile clients.

• •Sessions: stateful, server-side storage, easy logout, scaling complexity
• •JWT: stateless, client-side token, complex logout, horizontal scaling
• •Cookies: transport mechanism for either method

Generated with AI, which can make mistakes.