Anonymity in Voting Revisited.
ABSTRACT According to international law, anonymity of the voter is a fundamental
precondition for democratic elections. In electronic voting, several
aspects of voter anonymity have been identified. In this paper, we
re-examine anonymity with respect to voting, and generalise existing
notions of anonymity in e-voting. First, we identify and categorise the
types of attack that can be a threat to anonymity of the voter,
including different types of vote buying and coercion. This analysis
leads to a categorisation of anonymity in voting in terms of a) the
strength of the anonymity achieved and b) the extent of interaction
between voter and attacker. Some of the combinations, including weak and
strong receipt-freeness, are formalised in epistemic logic.