A Secure Electronic Voting Protocol Based On Mix-Net

With the rapid development of the internet technology and the modern cryptographic technology, a new way of voting named electronic voting has got people’s attention gradually. The advantage of electronic voting is obvious. It not only allows voters to enjoy the convenience of voting and the fair voting process, but also to significantly reduce the workload of auditors. At the same time, electronic voting can reduce some uncertainties during the entire voting process which is generated by the human factors, and it also avoid a lot of controversy in the traditional voting process. How to ensure the security of electronic voting systems is an important issue to be faced by the researchers.After Chaum design the first electronic voting protocol in 1981, many experts have designed a variety of electronic voting protocols for different requirements. However, there are some drawbacks existing in these protocols due to the changes of the attack. To run the electronic voting system more safety and efficient, we should design a reliable electronic voting protocol using the modern cryptographic technology.In this paper, we mainly study the Mix-net technology. Firstly we introduce the background, the theoretical basis and the security of the Mix-net briefly and analysis the existing protocol of the Mix-net. A lot of efforts have been devoted to study the security and the anti-repetition of the Mix-net. The main work of this paper is as follows:(1) We study and analysis the latest electronic voting protocol based on the Mix-net, and analysis the security of linear Cramer-Shoup encryption protocol.(2) To the universal verifiable Mix-net protocol, we also do the safety analysis for it and give the relevant attack schemes. We also present a Cramer-Shoup algorithm based on authentication.(3) At last, we propose a novel Mix-net electronic voting protocol combining with the improved Cramer-Shoup algorithm and the Mix-net protocol. The new protocol performs much better than the traditional electronic voting protocol on feasibility and security.