(1) common principles of CAS framework in SSO

SSO unified verification

SSO (Single Sign on, you can directly access the system.

CAS Overview

CAS is a SSO framework called Central Authentication Service. It is a good single sign-on Framework for Web applications, including Java ,. Net, PHP, prel, Apache, uportal, Ruby, etc.

Directly mount the schematic diagram, as shown in:

This picture is very good. After thinking about it, we moved it directly. We will describe the line between the First Login and not the first login.

First of all, we need to understand the following principles: What is a server and what is a client?

Server, from the first time we heard this word, we have been feeling very mysterious, a high feeling, feeling in the sky. In fact, the server is the opposite of ours. servers provide services for others. Baidu Baike said so, server is a computer that manages resources and provides services to users. To put it bluntly, a server is a computer, but this computer can provide services to other applications or computers, just like a waiter serving customers in a restaurant, and a computer like this is Anthropomorphic, it is called a server.

Compared with the customer, the waiter is no longer a waiter without a customer, and the customer may be another waiter, as is the case in the computer, and the server is relative to the client.

In, we first see CAS client and CAS server, which are two relative concepts. Without this framework, if our system logs on to our system page, Web browser is the client, and the machine that supports system background deployment belongs to the server. When CAS is added, we upgraded to another layer because the CAS server serves the CAS client.

Here, the CAS client includes the CAS client (a Java program) and the project that we want to use CAS single-point logon. They are put together to form the CAS client, CAS server verifies the entered user name and password in different ways.

Log on to the system for the first time and use cas

User