All Kerberos JAAS login modules that obtain a principal's password and generate the secret key from it should use this class. Sometimes, such as when authenticating a server in the absence of user-to-user authentication, the login module will store an instance of this class in the private credential set of a {@link javax.security.auth.Subject Subject} during the commit phase of theauthentication process.
A Kerberos service using a keytab to read secret keys should use the {@link KeyTab} class, where latest keys can be read when needed.
It might be necessary for the application to be granted a {@link javax.security.auth.PrivateCredentialPermission PrivateCredentialPermission} if it needs to access the KerberosKeyinstance from a Subject. This permission is not needed when the application depends on the default JGSS Kerberos mechanism to access the KerberosKey. In that case, however, the application will need an appropriate {@link javax.security.auth.kerberos.ServicePermission ServicePermission}. @author Mayank Upadhyay @since 1.4
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