Kerberos uses a Key Distribution Center (KDC) to validate the identities of users and services and to grant tickets to authenticated user and service accounts. In the Kerberos protocol, users and services are known as principals. The KDC has a database of principals and their associated secret keys that are used as proof of identity. Kerberos authentication is built on symmetric-key cryptography.
You can use Kerberos authentication when you connect to relational databases, like Microsoft SQL Server. You can configure Kerberos authentication for a connection to Microsoft SQL Server on the machine where you install the PowerCenter Integration Service. Compared to regular user name and password authentication, Kerberos authentication is more secure because the passwords are not stored locally or sent over the network.