Security Analysis and Improvement of E-voting System based on Oblivious Signatures

Abstract

E-voting systems have been widely investigated during these years. To achieve the security requirement, most of the e-voting systems utilize cryptographic technologies such as the encryption/decryption schemes and digital signature schemes. In the utilization of digital signatures, blind signatures and their extensions are widely used in the literature. In 2008, C. Song et al. firstly introduced their e-voting systems based on the utilization of oblivious signatures. However, we found that there are some security flaws or problems of C. Song et al.’s idea. In this paper, we will first point out these security flaws and then introduce our improved schemes. We hope that our research will be beneficial for the investigation of e-voting systems.