  Assessing and comparing the security level of different voting systems is
non-trivial as the technical means provided for and societal assumptions made
about various systems differ significantly. However, trust assumptions
concerning the involved parties are present for all voting systems and can be
used as a basis for comparison. This paper discusses eight concrete voting
systems with different properties, 12 types of parties involved, and seven
general security goals set for voting. The emerging trust relations are
assessed for their criticality, and the result is used for comparison of the
considered systems.
