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The emerging vehicular networks in the forms of intra-car, car-to-car, and car-to-infrastructure communications will enable a variety of applications for safety, traffic efficiency, driver assistance, as well as infotainment to be incorporated into future automotive designs. However, the availability of these exciting automotive applications can also lead to formidable set of exploits and vulnerable to attacks, as more and more data is being exchanged and communicated in and out of a car. In this paper, we present our initial works on embedded info-security solutions to protect the critical data for car communications via vehicular networks. We describe an info-security framework, system design, and the first solution prototype in this paper. The initial prototype shows that the proposed solution is feasible.