Design and Implementation of a Mobile Voting System Using a Novel Oblivious and Proxy Signature

Abstract

Electronic voting systems can make the voting process much more convenient. However, in such systems, if a server signs blank votes before users vote, it may cause undue multivoting. Furthermore, if users vote before the signing of the server, voting information will be leaked to the server and may be compromised. Blind signatures could be used to prevent leaking voting information from the server; however, malicious users could produce noncandidate signatures for illegal usage at that time or in the future. To overcome these problems, this paper proposes a novel oblivious signature scheme with a proxy signature function to satisfy security requirements such as information protection, personal privacy, and message verification and to ensure that no one can cheat other users (including the server). We propose an electronic voting system based on the proposed oblivious and proxy signature scheme and implement this scheme in a smartphone application to allow users to vote securely and conveniently. Security analyses and performance comparisons are provided to show the capability and efficiency of the proposed scheme.

Generalized Proxy Oblivious Signature and Its Mobile Application

“…In 2017, Chiou et al [38] proposed a novel oblivious signature which is integrated with proxy signature. eir protocol defines seven security requirements: completeness, unforgeability, unlinkability, undeniability, verifiability, distinguishability, and ambiguity.…”

“…In 2017, Chiou et al [20] proposed two novel 1-out-of-n blind (oblivious) and proxy signature schemes that combine the advantages of oblivious signatures and proxy signatures and satisfy the security properties of these two signature schemes. In 2018, Lin et al [21] proposed a short linearly homomorphic proxy signature scheme, and Li et al [22] proposed a blind proxy resignature scheme based on isomorphisms of polynomials.…”

“…In 2017, Cohensius et al [31] considered a social choice problem and demonstrated that the mechanism using proxy voting better approximates the optimal outcome. In the end of 2017, Chiou et al [20] proposed an anonymous e-voting system with proxy signer based on their proposed 1-out-of-n blind and proxy signature schemes.…”

“…Paper Contribution. is paper proposes a generalized tout-of-n proxy oblivious signature, which combines the advantages of proxy signature [13,38] and 1-out-of-n oblivious signature [8,9,38,39] and satisfies the security properties of the signature scheme. By using the concept proposed in [40], we conduct security analyses and proofs.…”

“…e performance comparisons show that our scheme is efficient. Our scheme can be easily applied to an anonymous t-out-of-n e-voting system with proxy signer using Chiou's method [20]. Based on our scheme, we also design a proxy-based fair e-lottery system which provides a multiple-prize multiple-choice function and satisfies the fairness and security properties of a lottery.…”