To support maintenance and servicing of industrial machines, service processes are even today often performed manually and analogously, although supportive technologies such as augmented reality, virtual reality and digital platforms already exist. In many cases, neither technicians on-site nor remote experts have all the essential information and options for suitable actions available. Existing service products and platforms do not cover all the required functions in practice in order to map end- to-end processes. PLASMA is a concept for a Cloud-based remote maintenance platform designed to meet these demands. But for a real-life implementation of PLASMA, security measures are essential as we show in this paper.