The CA Node Module implements the functionality of the CA Server, i.e., handling the application of proxy credentials from the master node as well as generating a corresponding SSON certificate and distributing it as a proxy credential to the master node. This module has a single class named CAServer, which provides all the functionality for the mission of this component. As depicted in its name, a CAServer substance is a server, which is implemented as an SSL socket server. This SSL socket server is configured to request client authentication, so that both communication parties must be authenticated by each other before a secure connection is set up. With such mechanisms, the CA server can ensure that the proxy credential is transferred to the real master node safely.