Developing open source software has proven to provide benefits to customers and OEMs vise versa [1]. IoT and Cloud development activities have already been around for decades and huge communities have grown among an immense variety of applications. However, the vehicle domain just recently approaches the connected era and still faces many challenges stemming from security, safety, reliability, real-time, or more demands. Such demands are also the reason for mandatory adaptations of existing technologies. Hence, Kuksa, i.e. an open-source platform, addresses such specific demands of the connected vehicle era and further uses and extends existing technologies to ease development, analysis, and activities for IoT and Cloud-based approaches for vehicles and provide a basis for new application fields. This paper presents a comprehensive description of technologies and their specifics towards secure data transmission and device management services.