ByteBench Guides
Break down each JWT part and learn what can be trusted at each verification step.
The header typically contains `alg` and optional `kid`. The payload contains claims like `sub`, `exp`, `iss`, and `aud`.
Both header and payload are easily decodable; they should not contain confidential data.
A valid signature proves token integrity relative to a specific key and algorithm.
It does not prove the token is currently allowed by your application policy.
Use these tools while following this guide. They are the fastest path from concept to verified output.
No. Your server should enforce allowed algorithms independently and never trust arbitrary header values.
Signature integrity and claim validity are separate checks. Expiration is a policy check after cryptographic verification.
It can, but keep claims minimal and avoid exposing sensitive data that could leak through logs or client storage.