Internet is the most unsecure place in this world. Kerberos is one of the most secure authentication protocols being used designed by Massachusetts Institute of Technology. Many of them consider that firewalls could protect the network. But firewalls assume that hackers and crackers are outside the network. But this assumption is false. It is as insecure as, if the passwords are sent from one host to other in unencrypted format, it is clearly visible by the bad guys. Thus it is highly prone to risks.
Kerberos is authentication protocol which allows client and server to authenticate in the most secure way and communicate as well. So all the messages and communication done is in encrypted format which is least considered as visible to outsiders. So Kerberos provides a secure solution for communication.
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