Cryptanalysis of a voting scheme

摘要

At Eurocrypt'93 Park, Iton and Kurusawa presented a voting scheme based on an efficient concrete mix-net. However, Pfitzmann pointed out that the used concrete mix-net is vulnerable to active and passive attacks. Therefore, the anonymity of the votes can't be guaranteed. Furthermore, Pfitzmann discussed some countermeasures against the attacks and how far they help.