'Revoking Access to JWT tokens with a Blacklist/Deny List' authentication login
Taking an example of the login process, a JSON containing the above information will be sent to the client, and then on each request, the client can send this JSON back to the server. This way, the server knows which userID is querying its APIs. If the JSON has expired, then the server can reject the request, and the user must log in again.value in the JSON and spoof being another user. To prevent this, the server sends the original JSON's "signature" along with the JSON.
But suppose the user intentionally logs out of your system? Or you want to kick them out because you fear that security has been compromised? You can't[1]: if they still have an unexpired token, they still have access. That’s what we’ll use in this example, and we’ll code our solution using Node.js and Express. If that’s not your chosen technology stack then fear not: the fundamental approach is the same regardless of how you choose to build it.First, you’ll need to instantiate your Express server application and set up Redis so that you can maintain a list of active JWTs:
import jwt from "jsonwebtoken"; app.post=> { const token=generateAccessToken; response.json; }); const generateAccessToken==> { return jwt.sign; };curl --location --request POST 'http://localhost:3000/createUser' \ --header 'Content-Type: application/json' \ --data-raw '{ "username": "Derek" }' "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6IkRlcmVrIiwiaWF0IjoxNjQxMzA3MTgxLCJleHAiOjE2NDEzMTA3ODF9.