React Native JWT Authentication: Common Pitfalls & Security Best Practices
JSON Web Tokens (JWTs) are a widely used standard for secure authentication and authorization in web and mobile applications. React Native developers often implement JWT-based authentication to secure user sessions. However, without proper implementation, JWTs can introduce security vulnerabilities. In this article, we’ll explore common pitfalls when using JWT in React Native applications and provide actionable solutions to avoid them. Visual Overview: graph LR subgraph JWT Token A[Header] --> B[Payload] --> C[Signature] end A --> D["{ alg: RS256, typ: JWT }"] B --> E["{ sub, iss, exp, iat, ... }"] C --> F["HMACSHA256(base64(header) + base64(payload), secret)"] style A fill:#667eea,color:#fff style B fill:#764ba2,color:#fff style C fill:#f093fb,color:#fff 1. Insecure Token Storage One of the most critical mistakes in JWT implementation is insecure storage of tokens. If a JWT is stored improperly, it can be easily accessed by malicious actors, leading to unauthorized access to user accounts. ...