Intelligent networking of cars and infrastructure (Car-to-X, C2X) by means of dedicated short range communication represents one of the most promising attempts towards enhancement of active safety and traffic efficiency in the near future. Nevertheless, as an open and decentralized system, Car-to-X is exposed to various attacks against security and driver's privacy. This paper presents an approach for enhancing security and privacy on physical layer, i.e., already during sending and receiving of messages. This technique is called Secure Beamforming. In previous works we deployed a simulation-based approach for defining an antenna-array appropriate for most of the safety-related use cases as defined by the Car-to-Car Communication Consortium (C2C-CC).In this paper we demonstrate a concept for integrating Secure Beamforming into an overall Car-to-X system architecture. The simTD architecture is thereby taken as the reference architecture because of its detailed specification and near-series alignment. We specify the components and interfaces necessary to enable Secure Beamforming and furthermore define beamforming protocols which are controlling the radiation pattern of the simTD antennas for a secure sending and receiving of messages.