A lightweight electronic voting scheme based on blind signature and Kerberos mechanism

Blind signature has been widely used in electronic voting because of its anonymity. However, all existing electronic voting schemes based on it require maintaining a Certificate Authority to distribute key pairs to voters, which is a huge burden to the electronic voting system. In this paper, we present a lightweight electronic voting system based on blind signature that removes the Certificate Authority by integrating the Kerberos authentication mechanism into the blind signature electronic voting scheme. It uses symmetric keys to encrypt the exchanged information instead of asymmetric keys to avoid the requirement for the Certificate Authority, and thus greatly reduces the cost of the electronic voting system. We have implemented the proposed system, and demonstrated it not only satisfies all the criteria for a practical and secure electronic voting system but also can resist most likely attacks depicted by the three threat models.