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In recent years, a large number of secure voting protocols have been proposed in the literature. Often these protocols contain flaws, but because they are complex protocols, rigorous formal analysis has proven hard to come by. Rivest’s ThreeBallot and Vote/Anti-Vote/Vote (VAV) voting systems are important because they aim to provide security (voter anonymity and voter verifiability) without requiring cryptography. In this paper, we construct CSP models of ThreeBallot and VAV, and use them to produce the first automated formal analysis of their anonymity properties. Along the way, we discover that one of the crucial assumptions under which ThreeBallot and VAV (and many other voting systems) operate—the short ballot assumption—is highly ambiguous in the literature. We give various plausible precise interpretations and discover that in each case, the interpretation either is unrealistically strong or else fails to ensure anonymity. We give a revised version of the short ballot assumption for ThreeBallot and VAV that is realistic but still provides a guarantee of anonymity. 相似文献
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利用环签名协议和比特承诺技术,提出了一种新的安全电子投票方案。即使注册机构和计票机构相互勾结,该方案也可无条件地保证投票人身份的匿名性。此外,本方案还可以分类统计投票人的观点。协议具有秘密性、唯一性、完整性、匿名性、公平性、可验证性等优点,适合进行大规模的选举。 相似文献
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One of the most challenging aspects in computer-supported voting is to combine the apparently conflicting requirements of privacy and verifiability. On the one hand, privacy requires that a vote cannot be traced back from the result to a voter, while on the other hand, verifiability states that a voter can trace the effect of her vote on the result. This can be addressed using various privacy-enabling cryptographic primitives which also offer verifiability.As more and more refined voting systems were proposed, understanding of first privacy and later verifiability in voting increased, and notions of privacy as well as notions of verifiability in voting became increasingly more refined. This has culminated in a variety of verifiable systems that use cryptographic primitives to ensure specific kinds of privacy. However, the corresponding privacy and verifiability claims are not often verified independently. When they are investigated, claims have been invalidated sufficiently often to warrant a cautious approach to them.The multitude of notions, primitives and proposed solutions that claim to achieve both privacy and verifiability form an interesting but complex landscape. The purpose of this paper is to survey this landscape by providing an overview of the methods, developments and current trends regarding privacy and verifiability in voting systems. 相似文献
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使用安全协议保护选民隐私、保证投票公正有效是投票电子信息化的基础,安全协议的复杂度则是电子投票应用的最大阻碍。提出了一种基于RLWE同态加密算法的多候选人电子投票协议,可支持多候选人,也能满足对选民隐私的保护。该协议利用基于RLWE的同态加密算法的加法同态性质在计票环节使用密文计票保护选民的私密,利用中国剩余定理的性质对选票进行批处理,提升计票能力。该投票协议能支持多候选人投票并最终知晓每个候选人最终票数,并设置公示机构公示投票过程中的每个步骤,用于公开验证。 相似文献
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Nafise Mohammadi Shakiba Mohammad-Ali Doostari Mostafa Mohammadpourfard 《Electronic Commerce Research》2017,17(3):463-494
Nowadays, with the growing popularity of e-Government services, security of client platforms and violation of citizen e-rights are of great concerns. Since Internet-voting protocols have no control over voter-side platforms, bribery/coercion and breaching vote’s privacy and voter’s anonymity are feasible. In fact, the voter-side platform (voter’s PC) is easily vulnerable to malicious software (cyber-attacks) and can totally breach security of the entire voting protocol. We have proposed ESIV: an end-to-end secure internet-voting system that highly guarantees: voter and server-side platform’s security, verifiability, fairness, resistance to bribery/coercion and voting authorities collusion besides simultaneous election support while preserving eligibility, anonymity, privacy and trust. In addition, we utilize Java Card 3 technology as an independent secure web-server which is connected directly to network in order to send/receive HTTP(S) requests using high-speed interfaces. This technology brings about independence from utilizing any trusted device at voter-side and provides end-to-end security. Finally, an implementation of ESIV is presented and ESIV security features are evaluated. 相似文献
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电子投票与传统投票方式相比更具经济性,但存在安全性论证不够严谨、运行时间长、计算消耗较大等问题。提出融合可链接环签密的智能合约电子投票协议,分别设计投票、秘密份额上传、计票等阶段的算法,在投票阶段基于椭圆曲线离散对数问题生成选票的可链接环签密,并在一个逻辑步骤内实现加密和签名,以确保投票的公正性、机密性和可验证性,避免重复投票情况的发生,从总体上降低协议运行时间和计算消耗的gas。此外,详细分析协议的安全性,基于椭圆曲线上的离散对数问题证明选票环签密的不可伪造性。使用truffle框架将智能合约部署到本地以太坊私有网络上,并通过挖矿以确认交易完成。实验结果表明,与Lyu协议相比,该协议节省了约107 Gwei的计算消耗以及450 ms左右的运行时间。 相似文献