What is single sign on and what is single sign on? What are the advantages of single sign on?

Single Sign On, or SSO for short, is one of the most popular solutions for enterprise business integration. SSO is defined as a system in which a user only needs to log in once to access all applications that trust each other. Enterprise Application Integration (EAI).

Enterprise application integration can be carried out at different levels: for example, "data centralization" at the data storage level, "common data exchange platform" at the transmission level, "business process integration" at the application level, and "common enterprise portal" at the user interface. In fact, there is another level of integration that is becoming more and more important, and that is the integration of "authentication", that is, "single sign-on".

In layman's terms, multiple applications share a common login authentication mechanism, and you can switch between multiple applications as long as you log in once.

Single sign-on is a single sign-in.

Blogging can directly improve your blog. No need to log in with a blog.

It's just a lot of applications (all that need to be logged in) and I only log in one program after the others.

Also logged in.

Single sign-on, abbreviated as SSO, is a user authentication process that allows users to access different applications in the system after one-time authentication. You don't need to re-enter your password every time you access each app.

Benefits of Single Sign-On:

1.Reduce the time it takes for users to log in to different systems and reduce the possibility of user login errors.

2.Security is achieved while avoiding the need to process and store the authentication information of users of multiple systems.

3.Reduces the time it takes for system administrators to add, remove, and modify user permissions.

4.Increased security: System administrators have a better way to manage users, including by directly banning and deleting a user to revoke that user's access to all system resources.

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The principle of single sign-on is to allow the application system to recognize users who have logged in. The application system should be able to identify and extract tickets, and through communication with the authentication system, it can automatically determine whether the current user has logged in, so as to complete the function of single sign-on.

When the user accesses the application system for the first time, he will be directed to the authentication system to log in because he has not yet logged in. Based on the login information provided by the user, the authentication system performs identity verification, and if it passes, it should return an authentication credential ticket to the user.

When the user accesses another application, he will bring this ticket as his authentication credential, and the application system will send the ticket to the authentication system for verification and check the legitimacy of the ticket after receiving the request. If the verification is passed, the user can access Application 2 and Application 3 without having to log in again.

Single Sign On, or SSO for short, is one of the most popular solutions for enterprise business integration.

Single sign-on is in an environment where multiple systems coexist, and users log in in one place without having to log in to other systems, that is, a user's login can be trusted by all other systems.

Single sign-on is used very frequently in large-scale applications, such as Alibaba, behind which there are hundreds of subsystems, and a user's operation or transaction may involve the collaboration of dozens of subsystems, if each subsystem requires user authentication, not only will the user be bored, but the subsystems will also collapse for the logic of repeated authentication and authorization.

Single sign-on: SSO, abbreviated as SAO, is one of the more popular solutions for enterprise business integration. The definition of SSO is that the user only needs to log in once to access all the applications that trust each other.

In simple terms. If a company has multiple applications, they all need to register and log in, and when they log out, they must be sold out one by one. The user experience is very bad. Single sign-on can be achieved: only once when logging in, and only once when logging out.

If localstorage is used to store tokens, but localstorage does not support cross-domain, you need to log in to a web page, and you need to write the corresponding tokens for other pages when the web page is in localstorage

Expansion

In the early stage of enterprise development, the company usually has only one web system, and the web system itself contains a login module, and it is very convenient for users to use their own login system. The following diagram illustrates the traditional system logon scenario:

With the development of the enterprise, the company has more and more web systems, each of which contains its own login module. It is conceivable that users need to log in to each system, and they need to log out one by one, which greatly affects the user experience. The following diagram represents the traditional multi-system logon scenario:

Web system checks have evolved from a single system to multiple systems, and the complexity should be borne by the system, not the user. No matter how complex the web system is, it is a unified whole for the user, that is, the user can access the entire application group of the web system as if it were a single systemLogin Log out only onceThat's enough.

We all know that every time a user requests the system, the cookie (including the sessionID) information on the browser will be sent to the backend of the system as the request header, and the backend will judge whether the user is logged in through the sessionID.

But there are some shortcomings in this way of improvement:

In order to solve the complexity problem caused by the traditional logon system, single sign-on came into being. Single Sign On, or SSO for short, is one of the more popular solutions for enterprise business consolidation. SSO is defined as multiple applications where users only need to log in once to block access to all applications that trust each other.

Single sign-on separates the login module into a unified authentication platform, and the application system does not need to develop a login module, but only needs to simply access the unified authentication platform. Here's a single sign-on diagram:

In different scenarios, single sign-on is implemented in different ways.

Single sign-on, in layman's terms, means that you only need to log in once to access all the applications that you trust each other. There should be nothing more popular than this.

The essence of single sign-on is to share the login state across multiple applications.

Single sign-on extracts the login module into a unified authentication platform, and the application system does not need to open the login module, but only needs to be simply connected to the unified authentication platform.