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Single Sign On - SSO

Single Sign On (SSO) is the ability of the user to login into his/her system or network and have access to all the applications which he is authorized to under the Lightweight Directory Access Protocol (LDAP). Another good definition is given on this page .A website with many links to SSO is defined here.

  What is Authentication?
         Authentication is the process of verifying or validating the user and password against some security processes.

   What is Authorization?
         Authorization is granting access (roles) to each user for a specific application.

Consider a company of say ten employees which contains an accounting system and a human resources system. Each user is authenticated and authorized on the company network to access public folders, intra-net, and possibly webmail.

However, only the HR department is authorized to access the HR system. Similarly, the Accounting department is authorized to access the accounting system. There is also a possibility that certai…