Quick Answer: Is JWT Secure Enough?

How does JWT verify work?

It works this way: the server generates a token that certifies the user identity, and sends it to the client.

The client will send the token back to the server for every subsequent request, so the server knows the request comes from a particular identity..

What should be JWT secret key?

The algorithm ( HS256 ) used to sign the JWT means that the secret is a symmetric key that is known by both the sender and the receiver. It is negotiated and distributed out of band. Hence, if you’re the intended recipient of the token, the sender should have provided you with the secret out of band.

Why do we use JWT token?

Information Exchange: JWTs are a good way of securely transmitting information between parties because they can be signed, which means you can be sure that the senders are who they say they are. Additionally, the structure of a JWT allows you to verify that the content hasn’t been tampered with.

How do you handle expired JWT tokens?

There are three ways:Changing the secret key. This will revoke all tokens of all users, which is not acceptable.Make each user has his own secret and just change the secret of a specified user. Now the RESTful backend is not stateless anymore. … Store the revoked JWT tokens in Redis.

What is OAuth standard?

OAuth definition OAuth is an open-standard authorization protocol or framework that describes how unrelated servers and services can safely allow authenticated access to their assets without actually sharing the initial, related, single logon credential.

Is REST API secure?

Security isn’t an afterthought. There are multiple ways to secure a RESTful API e.g. basic auth, OAuth etc. … but one thing is sure that RESTful APIs should be stateless – so request authentication/authorization should not depend on cookies or sessions.

How long should JWT secret be?

Security Concerns and Recommendation The second key, secret is 48-bit. This is simply too short to be a valid key. In fact, the JSON Web Algorithms RFC 7518 states that a key of the same size as the hash output (for instance, 256 bits for “HS256”) or larger MUST be used with the HS256 algorithm.

What should a JWT contain?

Unserialized JWTs have two main JSON objects in them: the header and the payload . The header object contains information about the JWT itself: the type of token, the signature or encryption algorithm used, the key id, etc. The payload object contains all the relevant information carried by the token.

Does Google use JWT?

The Google OAuth 2.0 system supports server-to-server interactions such as those between a web application and a Google service. … With some Google APIs, you can make authorized API calls using a signed JWT instead of using OAuth 2.0, which can save you a network request.

Should JWT be encrypted?

Always verify the signature before you trust any information in the JWT. … Do not contain any sensitive data in a JWT. These tokens are usually signed to protect against manipulation (not encrypted) so the data in the claims can be easily decoded and read.

What happens if JWT is stolen?

If a JWT is stolen, then the thief can can keep using the JWT. An API that accepts JWTs does an independent verification without depending on the JWT source so the API server has no way of knowing if this was a stolen token! This is why JWTs have an expiry value. And these values are kept short.

What does JWT verify return?

Synchronously verify given token using a secret or a public key to get a decoded token token – JWT string to verify secretOrPublicKey – Either the secret for HMAC algorithms, or the PEM encoded public key for RSA and ECDSA. [options] – Options for the verification returns – The decoded token.

Is JWT an OAuth?

So the real difference is that JWT is just a token format, OAuth 2.0 is a protocol (that may use a JWT as a token format or access token which is a bearer token.). OpenID connect mostly use JWT as a token format.

Is JWT secure over HTTP?

No, JWT is not required when your server supports HTTPS. HTTPS protocol ensures that the request & response are encrypted on the both(client & server) the ends. … JWT basically authenticates a user once & issues an access token which could be valid for a duration of time.

Should I store JWT token in database?

You could store the JWT in the db but you lose some of the benefits of a JWT. The JWT gives you the advantage of not needing to check the token in a db every time since you can just use cryptography to verify that the token is legitimate.

Should I use session or JWT?

JWT doesn’t have a benefit over using “sessions” per se. JWTs provide a means of maintaining session state on the client instead of doing it on the server. … Moving the session to the client means that you remove the dependency on a server-side session, but it imposes its own set of challenges.

Why is JWT bad?

An unexpiring JWT can become a security risk. You are also trusting the token signature cannot be compromised. This can happen if you are using weak encryption, encryption that becomes vulnerable in the future, or having the the private keys compromised. This vulnerability doesn’t exist with sessions.