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This survey was meant to give an impression about current problems and research in operating system security. It is not possible in this survey to write about every aspect of this topic. Nevertheless, it became clear that there are many different areas where further research is necessary. Especially, it is important to review new technologies for their impact on security. On the other hand, security is always relative to the requirements for a specific system. Different environments need different security policies. Therefore, it is necessary to define the degree of desired security and implement the system according to it.

Tim Wellhausen