Explain JWT vs PASETO.
JWT vs PASETO compares JSON Web Tokens (JWT)—a widely used token format for authentication—and Platform-Agnostic Security Tokens (PASETO), which simplifies cryptography and avoids JWT’s common security pitfalls.
When to Use
Use JWT when you need compatibility and ecosystem support (e.g., web APIs, mobile app authentication). Choose PASETO for systems requiring stronger defaults and fewer chances of cryptographic misuse.
Boost your prep: Strengthen your system design and coding knowledge with Grokking System Design Fundamentals, Grokking the Coding Interview, or practice live with Mock Interviews with ex-FAANG engineers.
Example
When a user logs in, the server issues a JWT or PASETO token; the client attaches it to each request to prove identity.
Why Is It Important
Tokens secure communication between client and server. JWT is flexible but risky if misconfigured; PASETO enforces safe cryptography by default.
Interview Tips
In interviews, briefly define both, then highlight:
- JWT = flexible, popular
- PASETO = secure-by-default, newer Frame your answer around trade-offs.
Trade-offs
- JWT: Pros → widespread adoption, library support. Cons → easy to misconfigure.
- PASETO: Pros → safer defaults. Cons → less adoption and ecosystem maturity.
Pitfalls
JWT mistakes include using weak algorithms or skipping validation. With PASETO, developers may assume “secure-by-default” means no need for good key management—still required.
GET YOUR FREE
Coding Questions Catalog
$197
$78
$78
