In our previous work, we have shown that the Helios 2.0 electronic voting protocol does not satisfy ballot independence and exploit this weakness to violate privacy; in particular, the Helios scheme is shown to be vulnerable to a replay attack. In this note we examine two further electronic voting protocols - namely, the schemes by Sako & Kilian and Schoenmakers - that are known not to satisfy ballot independence and demonstrate replay attacks that violate privacy.
@techreport{2011-attacking-ballot-secrecy-in-electronic-voting,
author = {Ben Smyth and Véronique Cortier},
title = {{A note on replay attacks that violate privacy in electronic voting schemes}},
year = {2011},
month = {June},
number = {RR-7643},
institution = {INRIA}
}