BFV-Blockchainvoting:支持BFV全同态加密的区块链电子投票系统

BFV-Blockchainvoting:blockchain-based electronic voting systems with BFV full homomorphic encryption

当前的电子投票系统大多依赖于中心服务器和可信第三方,这种系统架构增加了投票的安全隐患,甚至使投票可能失败。为了解决这一问题,将区块链技术应用于电子投票系统,使区块链代替可信第三方,提出了一种支持BFV全同态加密的区块链电子投票系统BFV-Blockchainvoting。首先,用一个公开透明的公告板记录选票信息,同时设计了智能合约来实现验证、自计票功能;其次,为进一步提高投票过程的安全可靠性,使用SM2签名算法对投票者的注册信息进行签名处理,再选择能够互相监督的双方共同监管选票,并使用BFV同态加密算法来隐藏计票数据。经过测试与分析,所提系统单张选票的计票时间平均为1.69ms。所提方案可以为投票过程中的不可操纵性、匿名性、可验证性、不可重用性、不可胁迫性和抗量子攻击等安全属性提供保障,适用于多种投票场合,并且可以满足大型投票场景下的高效率需求。

Current electronic voting systems mostly relied on central server and the trusted third party,this kind system architecture increases the security risks of voting,and even makes voting fail.In order to solve this issue,an electronic voting system BFV-blockchainvoting that supported BFV homomorphic encryption was proposed,and this system applied the blockchain technology to the electronic voting system to replace the trusted third party.Firstly,an open and transparent bulletin board was used to record the vote information,and an intelligent contract was used to realize the functions of verification and self counting.Secondly,in order to further improve the security and reliability of the voting process,the voter’s registration information was signed by SM2 signature algorithm,the ballot was managed by both parties that can supervise each other,and the counting data was encrypted by the BFV full homomorphic encryption algorithm.Finally,the evaluation of performance shows that it only costs 1.69 ms to complete one ballot in the proposed electronic voting system.This electronic voting scheme based on the BFV full homomorphic encryption and blockchain has better security attributes such as manipulation-resistance,anonymity,verifiability,double-voting resistance,coercion-resistance and resistance to quantum attacks.The scheme is suitable for a variety of voting scenarios and can meet the efficiency requirements in large voting scenarios.