Authentication used to be stateful for a long period of time. When a client tries to access the application with a token, the application verifies token sign with a private key, check if the token is expired, retrieves all session data from the token and makes a decision if a client has access to the desired resource.Both approaches make sense, both have their advantages and disadvantages. The process described in OpenID Connect (OIDC) specification.

… Authentication is a process exists in almost every application to Identify application client whether it is a user or other application. In Stateless Protocol, there is no tight dependency between server and client. If you are interested in the industrial design, you should definitely go for the specification of some authentication protocols. Stateful Protocol require server to save the status and session information. Stateless authentication easier to implement and scale, but stateful authentication is more secure and easier to manage.

While in Stateless, the server does store data, but in a database to verify user/client whenever it needs to connect. Each time the client makes a request to the server, the server locates the session memory using the reference Id from the client and finds the authentication information.In this model, you can easily imagine that if the session memory is deleted on the backend side, then the session reference Id, which the client is holding, is completely meaningless.Stateless authentication is used to solve the disadvantages of stateful authentication. When a client tries to access the application with a given token, the application tries to retrieve session data from session storage, checks if session valid and then decides whether the client has access to the desired resource or not.After successful authentication, the application generates token with all necessary data, signs it with a public key and sends it back to a client. Understanding Cloud Services - Stateful vs Stateless Applications Setting up hosting architecture is becoming more and more specialist all the time. Though we still cannot revoke the session data immediately, while we can forbid its lifetime extension by revoking the refresh token.In this article, I illustrate the ideas of stateful and stateless authentication. At an instant in time, to be exact. Stateless: The session expiration time is set when the authentication token is released. Stateful Authentication After successful authentication, the application generates a random token to send back to the client then creates a client authenticated session in memory or an internal database. Authentication token could be Stateless and Stateful. Then the server creates an id session, store it server-side. The data is signed by the key of IdP to ensure the integrity and authority of the session data.Since the user session is stored on the client side, the server only have the capability to verify its validity by checking whether the payload and the signature match.It is obvious that they have opposite pros and cons.

They are quite different and are used in different scenarios.Stateless authentication stores the user session data on the client side (browser). This means that the users used to input their entries. Not too long ago a hosting company simply set you up an account on a shared, or dedicated server in a single data centre somewhere. To access the application as an identified client, the client uses the received authentication token.Authentication token could be Stateless and Stateful.After successful authentication, the application generates a random token to send back to the client then creates a client authenticated session in memory or an internal database. There is a standard for token generation, it is JWT (JSON Web Token). ‘Stateful’ and ‘stateless’ have sort of a mutually dependent relationship when it comes to their definitions. The application ensures that credentials are correct, generates authentication token and sends it back to the client. In this article I am going to talk about two different ways of authentication: stateful and stateless authentication. To understand one, you need to understand the other. To be stateful is to essentially rely on these moments in time. When we talk about computer systems, a “state” is simply the condition or quality of an entity at an instant in time, and to be stateful is to rely on these moments in time and to change the output given the determined inputs and state.If that’s unclear, don’t worry — it’s a hard concept to grasp, and doubly so with APIs. While authentication client sends credentials to the application. Stateless vs stateful authentication. Stateless authentication is great, but it takes time to implement and it contains some restrictions. Moreover, to change the output when taking the determined inputs and state into account. In a stateful protocol, if a c… In Stateful protocol, there is tight dependency between server and client.