Smyth, B. & Cortier, V. (2011) A note on replay attacks that violate privacy in electronic voting schemes. Technical Report RR-7643, INRIA, France.
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.