What is JWT?
JWT means JSON Web Token. It is a secure method for transferring authentication information between clients and servers.
JWT Structure
A JWT contains three sections: Header, Payload and Signature.
JWT Header
The header defines the token type and signing algorithm.
JWT Payload
Payload contains claims such as user id, permissions and expiration time.
JWT Signature
The signature verifies that token data was not modified.
Why Developers Use JWT
- API authentication
- Mobile applications
- Single sign-on systems
- Secure authorization