JWT (JSON Web Token) is a modern standard for authorization and secure communication used in many APIs and microservice architectures. We implement full JWT support for user and service authentication, session management and access differentiation by role.
JWT tokens are stored on the client side, do not require sessions on the server, and are signed in order to ensure authenticity and protection against counterfeiting.
What JWT contains
| Field in token | Appointment |
|---|---|
| sub | User or Service ID |
| exp | Token Expiration Time |
| roles / scopes | User roles and available permissions |
| signature | Digitally signed for authentication |
| custom claims | Any additional data: language, hall ID, currency, etc. |
Implementation features
Format: 'header. payload. signature` (в base64)
Signature algorithms: HS256 (symmetric) and RS256 (asymmetric)
Support for refresh tokens and rotation- Working with CORS, mobile, web and server-to-server clients
- Ability to store token in cookies, localStorage or headers
Benefits of using JWT
Stateless: no need for a server session
Convenient for mobile, SPA and microservices- Scalability - easily implemented across multiple services
- Fast communication between client and API
- Flexibility - you can store any data necessary for authorization in the token
Where especially relevant
Mobile and front-end applications- Intraservice Authorization (S2S)
- Platforms with more concurrent users
- Systems with the need for a clear role model of access
JWT is a reliable and flexible API authorization and security tool. It provides scalable and secure application operation without depending on the server state.
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