Fritzsch, ClemensHoffmann, JörnBogdan, MartinEibl, MaximilianGaedke, Martin2017-08-282017-08-282017978-3-88579-669-5High quality random numbers are essential for secure servers, alas virtual machines suffer from low entropy. The generation of hard to predict random numbers is a crucial problem. Moreover, existing solutions can pose severe security risks, e.g. by providing covert channels. This work illustrates basic ways to provide high entropy random numbers to virtual machines. Furthermore the security risks and effectiveness of the random number distributions are compared. Finally a new approach is presented. It improves the security of virtualized server environments by assigning each virtual machine a separate TRNG.enSecurity Virtualization Random Numbers TRNG10.18420/in2017_491617-5468