This article describes how to configure Talend Studio to work with a Kerberos-enabled Hadoop cluster.
The Internet is an insecure place. Applications that send an unencrypted password over the network are extremely vulnerable. Companies use firewalls but these assume that "the bad guys" are on the outside, which can be a very bad assumption.
Kerberos is an authentication system that was created by MIT as a solution to these network security problems. It provides mutual protection to both ends of a transaction and the transaction itself. The Kerberos protocol uses strong cryptography so that a client can prove its identity to a server (and vice versa) across an insecure network connection. After a client and server have used Kerberos to prove their identity, they can also encrypt all of their communications to assure privacy and data integrity as they go about their business.
For more information on Kerberos, see MIT Kerberos Documentation.