"Design and Evaluation of Profiling Methods for the Distributed Enforcement Mechanism CliSeAu" Abstract: CliSeAu is a Java framework that allows the enforcement of security policies in a distributed system. CHAP and CCTP are two methods, introduced in this thesis, that give developers a detailed insight into the additional strain on the system, that can be attributed to the enforcement by CliSeAu. CHAP focuses on the memory allocation, CCTP on the CPU usage. To provide evidence of the applicability of these methods, a case study is performed. An evaluation of the efficiency of CliSeAu in the particular settings of the case study and of the usefulness of the methods in general will be given. Results show, that our methods produce sensible data and that some elements of CliSeAu consume a larger amount of resources than expected. Since developers may have specific requirements, that cannot be inspected efficiently with the two methods presented here, a variety of tools that could prove themselves useful in the design of new analyses of CliSeAu as well as an elaboration on the possible pitfalls when profiling a distributed system are mentioned in this thesis.