The course Secure Mobile Systems covers the theory and application of information security in mobile, wireless systems. This course is an ongoing "experiment", which builds on the explorative way we have been teaching this course over the last years. That is, we will typically hand out reading material in advance of each class and require the students to prepare themselves for the upcoming lecture. In class, we will discuss the papers and identify the most important aspects and contributions influencing secure mobile systems. This is complemented by presentations of the SeMoSy team.