# Package org.apache.catalina.ha.authenticator

- Class Summary
  Class | Description
  --- | ---
  ClusterSingleSignOn | A Valve that supports a "single sign on" user experience on each nodes of a cluster, where the security identity of a user who successfully authenticates to one web application is propagated to other web applications and to other nodes cluster in the same security domain.
  ClusterSingleSignOnListener | Cluster extension of `SingleSignOnListener` that simply adds the marker interface `ReplicatedSessionListener` which allows the listener to be replicated across the cluster along with the session.