How do JWT tokens work?

JWT or JSON Web Token is a string which is sent in HTTP request (from client to server) to validate authenticity of the client. JWT is created with a secret key and that secret key is private to you. When you receive a JWT from the client, you can verify that JWT with this that secret key.Click to see full answer. Likewise, when should I use JWT tokens? Using JWT for API authentication A very common use of a JWT token, and the one you should probably only use JWT for, is as an API authentication mechanism. Just to give you an idea, it’s so popular and widely used that Google uses it to let you authenticate to their APIs.Beside above, what JWT token contains? A well-formed JSON Web Token (JWT) consists of three concatenated Base64url-encoded strings, separated by dots ( . ): Header: contains metadata about the type of token and the cryptographic algorithms used to secure its contents. Simply so, how do I check my JWT token? To verify the signature of a JWT token Decode the ID token. You can use AWS Lambda to decode user pool JWTs. For more information see Decode and verify Amazon Cognito JWT tokens using Lambda . The OpenID Foundation also maintains a list of libraries for working with JWT tokens .Is JWT an OAuth?Basically, JWT is a token format. OAuth is an authorization protocol that can use JWT as a token. OAuth uses server-side and client-side storage. If you want to do real logout you must go with OAuth2.

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