Data Anonymity in the FOO Voting Scheme Sjouke Mauw, Jan Verschuren and Erik de Vink We study one of the many aspects of privacy, which is referred to as data anonymity, in a formal context. Data anonymity expresses whether some piece of observed data, such as a vote, can be attributed to a user, in this case a voter. We validate the formal treatment of data anonymity by analyzing a well-known electronic voting protocol.