What is Single-Sign On (SSO) ?

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The single sign-on (SSO) feature allows user to access other applications transparently without having to authenticate each time.

In a typical web scenario, the users need to authenticate themselves to access restricted information on the web sites. In the Single Sign-on (SSO) scenario, the user will have to enter his/her credentials only once, the first time that he/she accesses the web site. Later the same credentials will be used for accessing all other resources on the web server or on the Intranet network. The first process of the user entering his credentials and validation of those credentials by the web server is called authentication. The rest of the applications use this authenticated session to get the user name for them and logon this user automatically to them, the second process of getting the user name is called identification.

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