JavaScript Token

Overview of JavaScript Token

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  • JavaScript Token
  • Let’s start writing some code, shall we?

    Well, not yet actually.We need to set up the environment first.The code will have to wait at least a couple more minutes.This part is boring so to get up and running quick we’ll clone the repository from the tutorial above.

    Did someone say login?

    After implementing the registration, we should create a way for existing users to log in.Let’s think about it for a second.The register endpoint required us to create a user, hash a password, and issue a token.What will the login endpoint need us to implement? It should check if a user with the given email exists at all.But also check if the provided password matches the hashed password in the database.Only then will we want to issue a token.Add this to your AuthController.js.

    What is JSON Web Token (JWT)?

    JSON Web Token (JWT) is an easy way to secure an API.When a user authenticates first on a server, using for instance a standard login form, the server creates a token.This token includes some personal data, such as username or email address.Then, this token is signed server-side (to prevent token integrity), and sent back to the user.Within each next request, user sends the token to establish emitter identity.

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    Why should we use JSON Web Tokens?

    Let’s talk about the benefits of JSON Web Tokens (JWT) when compared to Simple Web Tokens (SWT) and Security Assertion Markup Language Tokens (SAML).

    Is this page helpful?

    Thank you.

    How do I fix it?

    Check the src path to your JavaScript to make sure it is correct.If you are making an Ajax request also check the path.Either the path is incorrect, or the file doesn’t exist.

    How do JSON Web Tokens work?

    In authentication, when the user successfully logs in using their credentials, a JSON Web Token will be returned.Since tokens are credentials, great care must be taken to prevent security issues.In general, you should not keep tokens longer than required.

    What is JSON Web Token?

    JSON Web Token (JWT) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object.This information can be verified and trusted because it is digitally signed.JWTs can be signed using a secret (with the HMAC algorithm) or a public/private key pair using RSA or ECDSA.

    Why No Framework?

    I wanted to write a post simply illustrating how everything works and how easily this can be achieved without any frameworks in place.It’s just another layer of abstraction you have to learn if you’re just trying to build some sort of login for your web app.

    How is a JWT token generated?

    Using Node.

    Do you have permission to be here?

    To comprehend the logic behind an authorization strategy we need to wrap our head around something called middleware.Its name is self explanatory, to some extent, isn’t it? Middleware is a piece of code, a function in Node.js, that acts as a bridge between some parts of your code.

    Introduction: What is a JWT?

    For a detailed, technical description of JWTs refer to this article.

    So, What’s the difference?

    If you compare these approaches, both receive a JWT down to the browser.Both are stateless because all the information your API needs is in the JWT.Both are simple to pass back up to your protected APIs.The difference is in the medium.

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    Thank you.

    What is the JSON Web Token structure?

    In its compact form, JSON Web Tokens consist of three parts separated by dots (.

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    Why Use Tokens?

    The use of tokens has many benefits compared to traditional methods such as cookies.

    Where Should JSON Web Tokens be Stored?

    This question drums up a lot of controversy around the internet.Perhaps even more controversial is whether you should be using JSON Web Tokens at all.For many applications that are as simple as the diagram above, cookies and sessions would be a sufficient form of authentication and authorization and would offer a lot of benefits.

    What went wrong?

    A specific language construct was expected, but something else was provided.This might
    be a simple typo.

    So What Are the Options?

    One way is to use the in-memory.It is the best option if you are developing a highly secured system.But it is not user-friendly, as the users get logged out whenever they refresh the page.

    What are JSON Web Tokens?

    JSON Web Tokens (JWT) have been introduced as a method of communicating between two parties securely.It was introduced with the RFC 7519 specification by the Internet Engineering Task Force (IETF).

    Why Should Not We Handle Authentication Tokens using the Client-Side Codes?

    As a beginner, we probably do not know whether there is another way other than storing authentication tokens using the client-side codes.Usually, there are two ways to store data using client-side JavaScript code: cookies and local storage.If you handle the authentication tokens in the local-storage, you are vulnerable to the XSS attack.On the other hand, if you try to put your authentication token in the cookies, you risk your project by enabling chances of getting CSRF attacks.From both perspectives, it is clear that storing and managing authentication tokens in the frontend can become dangerous for your project.

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