Fernando Doglio
Aug 12, 2022 ⋅ 5 min read

How to secure a REST API using JWT authentication

Fernando Doglio Technical Manager at Globant. Author of books and maker of software things. Find me online at fdoglio.com.

Recent posts:

Implementing Vector Search With Open Ai, Next Js, And Supabase

Implementing vector search with OpenAI, Next.js, and Supabase

Let’s build a Next.js app that implements vector search using Supabase and OpenAI to offer better search experiences for users.

Peter Ekene Eze
Feb 27, 2024 ⋅ 11 min read
Comparing React Native BLE libraries

Comparing React Native BLE libraries

Discover the most popular libraries for enabling Bluetooth Low Energy (BLE) in React Native apps, allowing them to interact with Bluetooth hardware on iOS and Android platforms.

Fimber Elemuwa
Feb 26, 2024 ⋅ 4 min read
Using CRDTs To Build Collaborative Rust Web Applications

Using CRDTs to build collaborative Rust web applications

CRDTs, or conflict-free replicated data types, is a concept that underlies applications facing the issue of data replication across a […]

Mario Zupan
Feb 23, 2024 ⋅ 15 min read
Guide to Using TensorFlow in Rust

Guide to using TensorFlow in Rust

We explore the fusion of TensorFlow and Rust, delving into how we can integrate these two technologies to build and train a neural network.

Rosario De Chiara
Feb 22, 2024 ⋅ 8 min read
View all posts

7 Replies to "How to secure a REST API using JWT authentication"

  1. You swapped the meaning of the issuer and the subject. The issuer is the authentication server which issued the token (usually a URI). The subject is the user being authenticated.

  2. this is best article, I have read every with context of explaining. you have explaines evrythig nicely and to the point. Thank you very much.

  3. That is a nice explanation! What about the need of changing the shared key, in case of symmetric encryption and signing? What option is there?
    I think the asymmetric encryptions would not be feasible for many client apps and even those keys have to be changed after some time!

  4. What problem does this solve that isn’t solved by, for example, Basic Authentication with a simple shared secret? How do you revoke access for a live JWT?

  5. Overall good explanation with the exception of having the JWT-secret known to the client.
    The only validation of the JWT that the client should do is to check the expiration-date of the JWT before using it.
    If it’s expired, then the client can go the route of re-authenticating the user.

    The back-end (API) is the only place that should know the JWT-secret so that it can verify if any JWT it receives was actually created by the back-end and was not tampered with.

  6. Great article. Note that JSON Web Tokens come in two flavors (or structures) – JSON Web Signature (JWS) and JSON Web Encryption (JWE). From the RFC: “JWT – A string representing a set of claims as a JSON object that is encoded in a JWS or JWE, enabling the claims to be digitally signed or MACed and/or encrypted.”

    The JWE compact serialization results in 5 parts, JWS is 3 parts.

Leave a Reply