基于隐私保护的随机共识资产跨链方案  

Privacy-preserving random consensus asset cross-chain scheme

作　　者：王宝银 薛红梅[1] 刘期烈 郭涛[3] WANG Baoyin;XUE Hongmei;LIU Qilie;GUO Tao(School of Information and Electrical Engineering,Hebei University of Engineering,Handan Hebei 056038,China;School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;School of Computer Science and Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]河北工程大学信息与电气工程学院,河北邯郸056038 [2]重庆邮电大学通信与信息工程学院,重庆400065 [3]重庆邮电大学计算机科学与技术学院,重庆400065

出　　处：《计算机应用》2025年第2期497-505,共9页journal of Computer Applications

基　　金：重庆市自然科学基金(联合)重点项目(2024NSCQ-LZX0169);重庆邮电大学博士研究生创新人才项目(BYJS202312)。

摘　　要：随着区块链单链协同向多链扩张的生态转化,跨链技术正在成为推动应用创新和增强系统能力的关键途径。然而,多链架构的分布式账本缺乏统一的身份认证方案,导致在资产跨链交易过程中可能面临隐私保护问题。因此,提出一种基于隐私保护的随机共识资产跨链方案。该方案引入随机公证人多签(RNMS)架构的跨链模型,并通过椭圆曲线迪菲-赫尔曼(ECDH)密钥协商算法来确保交易双方能够安全地协商共享密钥。此外,考虑到中间信任问题,设计一种基于改进Algorand的随机公证人选取算法,将该算法的轮盘式标号随机选取公证人的方式改进为可验证的伪随机方式,以降低伪随机选取风险,并确保跨链交互的安全性和去中心化。通过改进拜占庭协议(BA)降低共识的通信代价,进行BFT-Simulation平台算法仿真实验。实验结果表明:相较于Algorand算法,所提方案的验证节点私密性更高,跨链消息共识效率提高了89%,且用公证人机制验证让节点消息通信量减少了80%,可有效提高跨链安全性。With the ecological conversion from single-chain collaboration to multi-chain expansion in blockchain,crosschain technology becomes key path for driving application innovation and enhancing system capabilities.However,the absence of a unified identity authentication scheme in distributed ledgers with multi-chain architecture may pose potential privacy risks during asset cross-chain transactions.In response,a privacy-preserving random consensus asset cross-chain scheme was proposed.In the proposed scheme,the Random Notary Multiple Signature(RNMS)architecture-based crosschain model was introduced,and secure negotiation of shared keys by the two parties of transaction was insured through the Elliptic Curve Diffie-Hellman(ECDH)key negotiation algorithm.Furthermore,considering the intermediate trust problem,an algorithm for random notary selection based on enhanced Algorand approach was designed.In this algorithm,the roulettestyle labeling method for random notary selection was improved to a verifiable pseudo-random method,thereby reducing the risks associated with pseudo-random selection and ensuring the security and decentralization of cross-chain interactions.After that,Byzantine Agreement(BA)was improved to reduce the communication cost of consensus,and algorithmic simulations on BFT simulation platform were performed.Experimental results demonstrate that compared to Algorand algorithm,the proposed scheme achieves higher node privacy verification,enhances cross-chain message consensus efficiency by 89%,and reduces node message communication cost by 80%through notary mechanism verification.The above show that the proposed scheme can improve cross-chain security effectively.

关 键 词：资产交互 隐私保护 密钥协商 随机共识 公证人机制 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]