As name suggests, these servers are used for authentication purposes by various applications like verification of account credentials ie. account names and passwords, of their legitimate users. This authentication facility is provided aa a network service. For a legitimate client, a cryptographic ticket is created that can subsequently used to access various services.

Authentication is very critical for any application or service, as it becomes the basis for the following facilities:

Authorization - which is the determination whether a privilege may be granted to a particular user or process; or not.

Privacy - which keeps information confidential to only to the legitimate users

and Non-repudiation - which is the inability for denial of any task done, which was authorized to be done based on the authentication.

 

 


 
In Computer Center, IITK - following Authentication Server is used
 

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