A New Receipt-Free Voting Scheme Based on Linkable Ring Signature for Designated Verifiers

Receipt-freeness is an essential security property in electronic voting to prevent vote buying or coercion. In this paper, we propose a new approach to construct receipt-free electronic voting schemes. We first introduce the notion of linkable ring signature for designated verifiers which preserves all properties of a normal linkable ring signature while only the designated verifiers can verify the correctness of the signature. We then use this notion to construct a new receipt-free voting scheme. Furthermore, we prove that our voting scheme can achieve the desired security requirements.