【Author】 Li, Xinran Wang, Wei Gu, Hao
【影响因子】11.072
【主题类别】
区块链应用-实体经济-交通领域
【Abstract】Electric vehicles (EVs) have great potential in improving environmental sustainability. However, current charging infrastructures could not meet the heightening demand due to the rapid expansion of EVs. Sharing private charge posts with others during idle time, as a win-win solution for charge post owners and non-owner EV drivers, is a proactive response to the dilemma. To build a trusted environment for the peer-to-peer charge post rental service, we explore a blockchain-enabled sharing charging system with redesigned operating procedures and a tailored non-myopic charge post match strategy. The new system can leverage the advantages of blockchain in privacy-preserving and misbehavior-auditing while fully utilizing shared charging facilities. The proposed system model is validated on Ethereum, and test results suggest that the redesigned system can provide high quality services with affordable computational resource consumption. Moreover, the results also report that, compared to the myopic strategy, the non-myopic strategy can improve the overall matching successful rate of charging requests by considering the potential impact of each assignment, especially when charge post resources are scarce.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Electric vehicle; Sharing charging; Charging scheduling; Blockchain; Smart contract
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【影响因子】11.072
【主题类别】
区块链应用-实体经济-供应链
【Abstract】The production and sales of electric vehicles in China are continuously increasing, and a massive wave of scrap batteries is about to emerge. However, there are many challenges in the power battery recycling, such as a disorganized recycling system, a lack of standards, and low efficiency. In addition, the power battery recycling supply chain faces issues such as a lack of transparency, inadequate data management, low trustworthiness, and counterfeit products. Therefore, it's crucial to establish an efficient and sustainable power battery supply chain recycling system. Blockchain technology can provide solutions in decentralized data management, privacy protection, and anti-counterfeiting traceability. It addresses existing problems and improves the Power Batteries Reverse Supply Chain (PBRSC) ecosystem. Thus, this paper proposes a blockchain-based PBRSC management integration framework. Firstly, a four-layer blockchain power battery recycling platform is designed. Secondly, based on the proposed PBRSC framework, this paper studies three key component technologies: double-chain structure and its storage mechanism, information tracing module, and smart contract enabled battery trading management. Then, the validity and feasibility of the double-chain structure was demonstrated experimentally. Finally, the above architecture and key technologies are implemented in the system, the main functional modules are displayed on the interface, and the effectiveness of the framework is explained in cooperation with related enterprises.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Power battery; Blockchain technology; Reverse supply chain; Smart contract; Traceability
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【Author】 Ayadi, Ahmed Ghabri, Yosra Guesmi, Khaled
【影响因子】6.143
【主题类别】
区块链治理-市场治理-市场分析
【Abstract】This paper investigates the interaction and the directional predictability between the central bank digital currencies (CBDCs) and the major cryptocurrencies and stablecoins during the period between 17 May, 2019-31 December, 2021. To this aim, we employ the "Cross-Quantilogram" model, to examine how and whether the traditional digital currencies react to the CBDC uncertainty and attention shocks. Our findings suggest that CBDC uncertainty index is negatively related to cryptocurrency and stablecoin returns. Furthermore, the CBDC attention index is negatively associated with Bitcoin, Ethereum, XPR and Terra USD, however, it is positively related to Tether, Binance, USD Coin and Dai. Our results are useful for regulators, investors and policy makers, to understand and assess the potential effect of CBDC adoption news on the volatility of the stablecoins and traditional cryptos.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】CBDC; Cryptocurrencies; Stablecoins; Directional predictability; Cross-Quantilogram model
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实证数据
【影响因子】5.836
【主题类别】
区块链治理-技术治理-智能合约漏洞检测
【Abstract】Solidity smart contracts play an important role in enabling interactions and collaborations among users in a decentralized blockchain-based community, and their security has received much attention in the industry. One of the most serious security issues faced by Solidity smart contracts is that the use of delegatecall to make cross-contract calls will tamper with contract privilege, which is difficult to detect. To improve the robustness of smart contract privilege control mechanisms at the level of source code, this paper designs and implements a new cross-contract static analysis tool called TaintGuard based on the abstract syntax tree of Solidity code and by combining taint analysis and instrumentation monitoring. TaintGuard uses solc to obtain the abstract syntax tree of the contract source code and then traverses the nodes of the tree to filter call relations that use delegatecall for cross-contract calls. Then, TaintGuard obtains the control flow graph within the target function, determines whether there are problematic paths in the control flow graph that may cause implicit leakage of contract privileges through static taint analysis, and instruments monitoring code in the corresponding position of the program. In this way, the contract status in the runtime stage is monitored to prevent the contract privileges from being tampered with by malicious callers. Finally, TaintGuard is evaluated against existing static analysis tools for Solidity smart contracts. The evaluation results indicate that TaintGuard outperforms other tools in terms of execution efficiency. Also, it can effectively fix the contract code with privilege leaks with a acceptable overhead.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Solidity; Smart contract; Delegatecall; Taint analysis; Privilege leakage; Abstract syntax tree
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【Author】 Ben Omrane, Walid Qi, Qianru Saadi, Samir
【影响因子】4.820
【主题类别】
区块链治理-市场治理-市场分析
【Abstract】Motivated by recent evidence showing that shocks in cryptocurrencies' trade volume increase their energy consumption and carbon footprint, this study seeks to identify the news-based determinants of the volume and number of trades of Bitcoin and Ethereum. Specifically, we investigate how the trading volume and number of trades in Bitcoin and Ethereum react to the release of U.S., German and Japanese macroeconomic news. Using 5-min frequency Bitcoin and Ethereum prices quoted against the US dollar, we find that the volume and number of trades show a significant response to macroeconomic releases. Furthermore, both the volume and number of trades in Bitcoin and Ethereum react to the same U.S. macroeconomic news, such as the Consumer Confidence Index, new home sales, and FOMC rate decisions. Our findings suggest that macroeconomic news can contribute to major cryptocurrencies' increased energy consumption and carbon footprint.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Energy consumption; Cryptocurrencies; Macroeconomic news; Trading volume; Bitcoin; Ethereum; High-frequency data
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实证数据
【Author】 Menon, Subhita Anand, Divya Kavita, Sahil Verma, Sahil Kaur, Manider Jhanjhi, N. Z. M. Ghoniem, Rania Ray, Sayan Kumar
【影响因子】3.847
【主题类别】
区块链应用-实体经济-智能家居
【Abstract】With the increasing growth rate of smart home devices and their interconnectivity via the Internet of Things (IoT), security threats to the communication network have become a concern. This paper proposes a learning engine for a smart home communication network that utilizes blockchain-based secure communication and a cloud-based data evaluation layer to segregate and rank data on the basis of three broad categories of Transactions (T), namely Smart T, Mod T, and Avoid T. The learning engine utilizes a neural network for the training and classification of the categories that helps the blockchain layer with improvisation in the decision-making process. The contributions of this paper include the application of a secure blockchain layer for user authentication and the generation of a ledger for the communication network; the utilization of the cloud-based data evaluation layer; the enhancement of an SI-based algorithm for training; and the utilization of a neural engine for the precise training and classification of categories. The proposed algorithm outperformed the Fused Real-Time Sequential Deep Extreme Learning Machine (RTS-DELM) system, the data fusion technique, and artificial intelligence Internet of Things technology in providing electronic information engineering and analyzing optimization schemes in terms of the computation complexity, false authentication rate, and qualitative parameters with a lower average computation complexity; in addition, it ensures a secure, efficient smart home communication network to enhance the lifestyle of human beings.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】blockchain; consensus protocol; dragonfly algorithm; Levenberg model; smart contract
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【DOI】 10.3390/s23136132
【Author】 Park, Joonseok Jeong, Sumin Yeom, Keunhyuk
【影响因子】3.847
【主题类别】
区块链技术-核心技术-智能合约
【Abstract】In this paper, we propose a smart contract broker to improve the reusability of smart contracts in a blockchain environment. The current blockchain platform lacks a standard approach to sharing and managing smart contracts, which makes it difficult for developers to reuse them and leads to efficiency issues. The proposed smart contract broker uses tags to identify and organize smart contracts, and it provides an environment for comparing and reusing smart contracts. This improves the reusability of smart contracts and efficiency. The proposed smart contract broker can be applied as a reference model that increases the flexibility and reusability of smart contract management in a blockchain environment.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】smart contract; smart contract broker; smart contract management; blockchain
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【DOI】 10.3390/s23136149
【影响因子】3.721
【主题类别】
区块链技术-核心技术-加密算法
区块链技术-协同技术-联邦学习
【Abstract】In federated learning (FL), a parameter server needs to aggregate user gradients and a user needs to protect the value of their gradients. Among all the possible solutions to the problem, those based on additive homomorphic encryption (AHE) are natural. As users may drop out in FL and an adversary could corrupt some users and the parameter server, we require a dropout-resilient AHE scheme with a distributed key generation algorithm. In this paper, we aim to provide a lattice based distributed threshold AHE (DTAHE) scheme and to show their applications in FL. The main merit of the DTAHE scheme is to save communication bandwidth compared with other latticed based DTAHE schemes. Embedding the scheme into FL, we get two secure aggregation protocols. One is secure against a semi-honest adversary and the other is secure against an active adversary. The latter exploits a smart contract in a ledger. Finally, we provide security proofs and performance analysis for the scheme and protocols.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Federated learning; Privacy protection; Additive homomorphic encryption; Smart contract
【发表时间】2024
【收录时间】2023-08-08
【文献类型】 实验仿真
CCF-B
【影响因子】3.514
【主题类别】
区块链技术-核心技术-智能合约
【Abstract】Smart contracts are pieces of code that reside inside the blockchains and can be triggered to execute any transaction when specifically predefined conditions are satisfied. Being commonly used for commercial transactions in blockchain makes the security of smart contracts particularly important. Over the last few years, we have seen a great deal of academic and practical interest in detecting and fixing the bugs in smart contracts written by Solidity. But little is known about the real bug fixes in Solidity smart contract projects. To understand the bug fixes and enrich the knowledge of bug fixes in real-world projects, we conduct an empirical study on historical bug fixes from 46 real-world Solidity smart contract projects in this paper. We provide a multi-faceted discussion and mainly explore the following four questions: File Type and Amount, Fix Complexity, Bug distribution, and Fix Patches. We distill four findings during the process to explore these four questions. Finally, based on these findings, we provide actionable implications to improve the current approaches to fixing bugs in Solidity smart contracts from three aspects: Automatic repair techniques, Analysis tools, and Solidity developers.& COPY; 2023 Elsevier Inc. All rights reserved.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Bug fix; Empirical study; Smart contract; Solidity
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实证数据
【Author】 Xiao, Yao Xu, Lei Zhang, Can Zhu, Liehuang Zhang, Yan
【影响因子】3.491
【主题类别】
区块链技术-协同技术-隐私保护
【Abstract】The metaverse is an advanced digital world where users can have interactive and immersive experiences. Users enter the metaverse through digital objects created by extended reality and digital twin technologies. The ownership issue regarding these digital objects can be solved by the blockchain-based nonfungible token (NFT), which is of vital importance for the economics of the metaverse. Users can utilize NFTs to engage in various social and economic activities. However, current NFT protocols expose the owner's information to the public, which may contradict with the privacy requirement. In this article, we propose a protocol, NFTPrivate, that can realize anonymous and confidential trading of digital objects. The key idea is to utilize cryptographic commitments to hide users' addresses. By constructing proper zero-knowledge proofs, the owner can initiate privacy-preserving yet publicly verifiable transactions. Illustrative results show that the proposed protocol has higher computation and storage overhead than traditional NFT protocols. We think this is an acceptable compromise for privacy protection.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Metaverse; Standards; Nonfungible tokens; Smart contracts; Cryptocurrency; Privacy; Economics; Blockchains; Immersive experience; Interactive systems; User experience; Object tracking
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【影响因子】3.476
【主题类别】
区块链技术-协同技术-物联网
区块链应用-实体经济-供应链
【Abstract】To realize efficient cooperation among tea plantations, manufacturers, logistics, and sellers, the tea production and supply chain (PSC) benefits participating enterprises by coordinating tea planting, product processing, transportation, and product sales links. However, the current tea PSC lacks resource-saving automatic control and suffers from the effect of counterfeit tea products and inefficient supervision. To address these problems, in this work, blockchain and Internet of Things (IoT) technologies are applied to turn the tea PSC around with efficient automation and decentralized supervision. Specifically, we propose DeTea, a blockchain-IoT-empowered decentralized framework, for chain-wide tea counterfeiting supervision and automatic environment management. On the one hand, for the benefit of tea customers, an incentive scheme is designed based on blockchain technology to attract tea PSC participants and decentralized detectors to report dishonest participants, which can motivate the good behaviors of the participating enterprises for a healthier tea market. On the other hand, for the benefit of practitioners of tea products, we realize the automation of environment monitoring and equipment control via IoT technology. Moreover, we design an improved adaptive weighted data fusion algorithm for accurate IoT data and efficient resource allocation, and present an optimal irrigation strategy for automatic plantation environment adjustment. To evaluate the proposed solution, a prototype is implemented by designing a blockchain infrastructure with ten main smart contracts and constructing an IoT-based system sandbox for automatic environment monitoring and resource allocation. Experimental results demonstrate the high throughput of DeTea and the efficiency of resource-saving automation. This work introduces blockchain and IoT technologies to tea PSC for full-process traceability and automatic environment control, which is expected to extend to other agricultural products to ensure the safety, reliability, and efficiency of agricultural traceability systems.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Blockchain; Internet of Things; Resource-saving; Counterfeit detection; Automatic control
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【Author】 Chen, Taowei Ren, Zhixin Yu, Yimin Zhu, Jie Zhao, Jinyi
【影响因子】2.838
【主题类别】
区块链技术-协同技术-密码学
【Abstract】To address the quantum attacks on number theory-based ciphertext policy attribute-based encryption (CP-ABE), and to avoid private key leakage problems by relying on a trustworthy central authority, we propose a lattice-inspired CP-ABE scheme for data access and sharing based on blockchain in this paper. Firstly, a CP-ABE-based algorithm using learning with errors (LWE) assumption is constructed, which is selective security under linear independence restriction in the random oracle model. Secondly, the blockchain nodes can act as a distributed key management server to offer control over master keys used to generate private keys for different data users that reflect their attributes through launching transactions on the blockchain system. Finally, we develop smart contracts for proving the correctness of proxy re-encryption (PRE) and provide auditability for the whole data-sharing process. Compared with the traditional CP-ABE algorithm, the post-quantum CP-ABE algorithm can significantly improve the computation speed according to the result of the functional and experimental analysis. Moreover, the proposed blockchain-based CP-ABE scheme provides not only multi-cryptography collaboration to enhance the security of data access and sharing but also reduces average transaction response time and throughput.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】post-quantum cryptography; blockchain; ciphertext policy attribute-based encryption; data sharing; privacy protection
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【DOI】 10.3390/app13137765
【影响因子】2.557
【主题类别】
区块链技术-协同技术-物联网
区块链技术-协同技术-边缘计算
【Abstract】In order to solve the problem of data security and management between IoT edge nodes and massive heterogeneous devices, combined with the wide application of blockchain technology in distributed system data security management, a blockchain-based Internet of Things access control model (SC-ABAC) is proposed by combining smart contracts and attribute-based access control. The traditional consensus algorithm PoW (Proof of Work) and SC-ABAC access control management process are optimized. By quantitative analysis, the time to call contracts in the query process increases linearly, the time of the policy addition and judgment process is constant, and the energy consumption of the optimized consensus mechanism is smaller than that of the PoW unit. This model provides decentralized, fine-grained, and dynamic access control management in IoT environments, enabling distributed systems to reach consensus faster and ensure data consistency.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Blockchain; Internet of things; Smart contract; SC-ABAC
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【Author】 Ergun, Serap
【影响因子】2.352
【主题类别】
区块链应用-实体经济-能源领域
【Abstract】PurposeThe purpose of this study is to propose a decentralized multi-party cross-trading scheme based on a certificate transaction mechanism for the transaction of excess consumption certificates (ECCs) of renewable energy. The aim is to address the problems associated with the existing centralized transaction mode and to promote the development of the green electricity industry.Design/methodology/approachThe proposed scheme involves calculating the quotation difference for the same type of certificate transaction based on the quotations of all users of both buyers and sellers. The transaction volume is then determined based on the order of quotation difference from large to small, and the total interests of cooperation are calculated. The nucleolus method is adopted to allocate the total interests to each member of the alliance and calculate the final transaction price. The blockchain technology is used for the transaction to achieve accurate traceability and efficient supervision, and a corresponding smart contract is designed and simulated in the Ethereum consortium chain.FindingsThe results of the simulation show the rationality and effectiveness of the proposed scheme. The decentralized multi-party cross-trading scheme can overcome the problems associated with the existing centralized transaction mode, such as low transaction efficiency, difficulty in obtaining the optimal transaction strategy and efficient supervision. The proposed scheme can promote the development of the green electricity industry by stimulating users' demand potential for green electricity.Originality/valueThe proposed scheme is original in its use of a certificate transaction mechanism to facilitate the trading of ECCs of renewable energy. The scheme adopts a decentralized multi-party cross-trading approach that overcomes the problems associated with the existing centralized transaction mode. The use of the nucleolus method for the allocation of total interests to each member of the alliance is also original. Finally, the use of blockchain technology for accurate traceability and efficient supervision of the transaction is an original contribution to the field.
你可以尝试使用大模型来生成摘要 立即生成
【Keywords】Certificate transaction; Transaction strategy; Consortium chain; Cooperative game theory; Nucleolus method; Smart contract
【发表时间】2023
【收录时间】2023-08-08
【文献类型】 实验仿真
【DOI】 10.1108/K-01-2023-0022
【作者】 刘宪权;
【作者单位】华东政法大学;
【文献来源】比较法研究
【复合影响因子】10.538
【综合影响因子】5.981
【主题类别】
区块链治理-法律治理-元宇宙
【摘要】元宇宙空间将会发生万物数字化现象，数据将成为元宇宙空间一切事物的本源。刑法理论上可以列入数据犯罪范畴的只能是以数据为犯罪对象且直接或间接侵害法益为国家数据管理秩序的犯罪。纯正的数据犯罪是指以国家数据管理秩序为主要直接侵害法益的犯罪；不纯正的数据犯罪是指将国家数据管理秩序依附于信息、公共安全等其他法益而进行间接侵害的犯罪。元宇宙数据可以分为表规则的数据、表人和表物的数据以及表信息内容的数据，分别对应数据的规则层、数字符号层和信息内容层三个维度。侵害元宇宙空间表规则数据的行为可能构成计算机犯罪而无法构成数据犯罪；侵害元宇宙空间表人和表物数据的行为可能构成相应的人身、财产犯罪而无法构成数据犯罪；侵害元宇宙空间表信息内容数据的行为应构成数据犯罪。
【关键词】元宇宙空间;;数据分类分级;;现行刑法规定缺陷;;刑法保护;;路径选择
【文献类型】 观点阐述
【发表时间】2023-08-08
【作者】 黄敏;宋扬;高哲明;胡悦嫣;王兴伟;
【作者单位】东北大学信息科学与工程学院;东北大学计算机科学与工程学院;
【文献来源】控制与决策
【复合影响因子】2.617
【综合影响因子】1.783
【主题类别】
区块链应用-实体经济-产品溯源
【摘要】产品溯源体系建设是完善经济全球化治理架构的重要方面,对保证产品的质量和安全、保护消费者权益、促进社会发展具有重要的意义.从现有的产品溯源框架、方法和系统平台3方面对产品溯源相关研究成果进行综述.首先,从溯源信息存储、溯源深度提升、溯源模块化设计和溯源监管4个角度,对产品溯源框架进行介绍;其次,将现有产品溯源方法分为产品标识溯源方法和区块链溯源方法两个类别,并分别对各个类别的溯源方法进行详述和分析;进而,围绕在食品畜牧、供应链、数字凭证和知识产权4个应用方向,对现有的产品溯源系统平台进行介绍;最后,基于对产品溯源研究工作的综述和分析,从异构多源溯源数据管理架构、成员共享激励与可信协作机制、溯源数据安全保障、溯源实时性保障、溯源过程有效监管5个方面,对当前产品溯源面临的挑战和未来的发展前景进行分析和展望.
【关键词】产品溯源;;溯源框架;;产品标识;;区块链;;溯源系统平台;;可信溯源
【文献类型】 综述
【发表时间】2023-08-08
【作者】 马光;江伟;李文朝;聂涌泉;孙超;
【作者单位】中国南方电网有限责任公司;南京南瑞继保电气有限公司;
【文献来源】电力工程技术
【复合影响因子】2.564
【综合影响因子】2.299
【主题类别】
区块链应用-实体经济-能源领域
【摘要】分布式能源的广泛发展使其成为电力市场的考虑重点，而传统的数据交互平台无法满足大规模分布式能源交易高效灵活、安全可靠的需求。为解决高信息处理复杂度与安全快速交易需求之间的矛盾，文中提出基于云边协同和区块链的分布式能源交易系统架构和整体设计方案。首先设计了云计算与边缘计算协同并结合两层区块链的系统架构，利用区块链技术实现交易去中心化，提高了交易的自主高效性，利用云边协同提升海量数据的处理能力和交易系统的扩展能力。然后基于双向竞价和预测补偿设计了分布式能源的交易机制，进一步对区块链的核心共识算法进行分析，并采用改进委托权益证明(delegated proof of stake, DPoS)作为交易系统的高效率、高可靠共识算法，实现大规模分布式能源的高效可靠交易，促进分布式能源参与电网调节，提高电网稳定运行水平。最后通过应用实例验证了所提系统对大规模分布式能源交易的适应性和优越性。
【关键词】云计算;;边缘计算;;云边协同;;区块链;;分布式能源;;电力交易系统
【文献类型】 理论模型
【发表时间】2023-08-08
【作者】 王微渊;毕远伟;陈霄汉;李传彪;
【作者单位】烟台大学计算机与控制工程学院;
【文献来源】应用科学学报
【复合影响因子】
【综合影响因子】
【主题类别】
区块链技术-核心技术-共识机制
【摘要】针对在联盟链中实用拜占庭容错（practical Byzantine fault tolerance, PBFT）算法所存在的通信开销过大、节点信誉度无法保证、算法无法动态地增删节点等问题，提出了基于决策树改进的PBFT(decision tree Byzantine fault tolerance, DTBFT)算法。首先，针对联盟链的应用场景，简化了PBFT算法的一致性协议，降低了通信开销；其次，考虑到系统安全性的问题，引入信誉积分机制，增加决策树分类算法，在每轮共识完成后，统计节点行为，对节点分类，使得系统可以动态地剔除拜占庭节点，提高系统的安全性；最后，为了防止拜占庭节点当选主节点，视图频繁切换，导致系统运行效率低的问题，改进了视图切换协议，将主节点的选取范围缩小到节点信誉好的高级节点，保证主节点的可信度。实验表明，DTBFT算法在吞吐量、算法安全性等方面较PBFT算法具有一定的提升。
【关键词】区块链;;联盟链;;共识算法;;实用拜占庭容错;;决策树分类
【文献类型】 理论模型
【发表时间】2023-08-08
【作者】 潘亮;陈彬;代明军;王滔滔;张胜利;
【作者单位】深圳大学电子与信息工程学院;深圳大学区块链技术研究中心;
【文献来源】应用科学学报
【复合影响因子】
【综合影响因子】
【主题类别】
区块链技术-核心技术-智能合约
【摘要】针对集中式动态频谱共享存在的频谱资源数据安全威胁、管理成本高、扩展性低等问题，利用区块链技术的去中心化、数据不可篡改等特性，提出了一个基于区块链智能合约的动态频谱共享方案。首先，利用区块链ERC4907协议设计了频谱券，保证频谱资源的唯一性标识并可租赁；其次，利用区块链预言机来实时更新空闲频谱资源数据，实现频谱数据的上链；再次，通过基于智能合约的拍卖算法以及Vue框架实现在前端页面对空闲频谱资源所对应的频谱券租赁期限的拍卖。实验结果表明，提出的基于区块链智能合约技术的动态频谱共享方案能够满足用户安全有效地进行动态频谱共享，具有可行性。
【关键词】区块链;;智能合约;;动态频谱共享;;频谱券;;预言机
【文献类型】 实验仿真
【发表时间】2023-08-08
【作者】 金朝榜;欧阳娟;
【作者单位】西南财经大学法学院;上海大学文化遗产与信息管理学院;
【文献来源】科技与法律(中英文)
【复合影响因子】
【综合影响因子】
【主题类别】
区块链治理-法律治理-元宇宙
【摘要】元宇宙“去中心化”的组织建构，排斥权力中枢和权威主义，与“中心化”法律监管相抵牾。如何协调二者关系，既要避免法律监管的不当侵入而损害元宇宙发展，也要防止法律监管的缺位致使元宇宙空间沦为“法外之地”，可行的做法是通过元宇宙空间分层，明确法律监管的场域和方式。在法律监管场域层面，根据元宇宙空间行为是否具有“负外部性”的标准，可将元宇宙空间进一步划分为“纯粹虚拟空间”和“虚实交融空间”两种类型，并将法律监管场域限定为元宇宙中的“虚实交融空间”。在法律监管方式层面，既可以通过法律涵摄模式予以直接监管，也可以通过“法律的代码化”或“法律规制技术”的方式予以间接规制。
【关键词】元宇宙空间;;纯粹虚拟空间;;虚实交融空间;;法律监管
【文献类型】 观点阐述
【发表时间】2023-08-08
【作者】 吴海涛;刘月;
【作者单位】西南交通大学交通运输与物流学院;综合交通运输智能化国家地方联合工程实验室;综合交通大数据应用技术国家工程实验室;
【文献来源】安全与环境学报
【复合影响因子】
【综合影响因子】
【主题类别】
区块链应用-实体经济-交通领域
【摘要】为分析区块链技术在危险货物道路运输安全监管中的应用价值，利用演化博弈法建立由监管方、承运方和托运方构成的三方演化博弈模型，确定收益矩阵和复制动态方程，分析演化博弈系统中各均衡点的稳定条件。利用MATLAB对各利益主体的策略选择进行了动态演化分析，探究三方演化博弈中相关变量对三方演化策略选择的影响。结果表明：区块链的应用成本与各参与方的策略选择呈负相关；应用区块链技术对监管方合规监管、承运方和托运方遵守规定倾向的提升程度及应用区块链时监管方的补贴程度与各方的策略选择呈正相关；监管方责任规避系数与策略选择呈负相关，承运方和托运方的责任附加系数与策略选择呈正相关。
【关键词】安全社会工程;;危险货物运输;;安全监管;;区块链;;三方演化博弈
【文献类型】 实证数据
【发表时间】2023-08-08
【作者】 张泽丹;王斌;陈婷;李青山;吴琛;胡旭磊;杨星辰;温宵宵;唐旭东;
【作者单位】中国中医科学院中医药数据中心;中国中医科学院西苑医院;博雅正链(北京)科技有限公司;中国中医科学院;
【文献来源】中华中医药学刊
【复合影响因子】
【综合影响因子】
【主题类别】
区块链应用-实体经济-科研领域
区块链应用-实体经济-中医领域
【摘要】利用区块链和联邦学习等技术，构建基于区块链的中医消化领域临床科研一体化数据共享平台，包括中医消化领域优势病种数据管理系统、中医消化领域优势病种可信联合循证分析联盟链和中医消化领域优势病种可信联合循证分析平台。该方案支持多途径数据采集，包括医院信息管理系统(Hospital Information System， HIS)/医学实验室信息管理系统(Laboratory Information Management System， LIS)/电子病历（Electronic Medical Record， EMR）等业务系统中临床数据定时抽取和手动导入，科研数据经病例报告表（Case Report Form，CRF）手动录入和自动映射等方式；并支持原始数据本地存储，仅将数据索引和数据Hash特征进行共识上链存证；基于RegLang智能合约监管，实现监管规则的数字化、自动化和智能化，保证智能合约的安全性，实现数据安全共享的函数级控制；借助分布式算法实现各节点本地单独计算、汇总结果链上流转等功能，做到 “算法多跑路，数据不跑路”，充分保障数据安全与隐私。整个平台架构在数据安全存储和可信计算之上实现了多中心医学研究全场景的解决方案，拥有面向多样化医疗科研场景所需的上层应用能力，如多中心临床研究开展、跨区域专病数据库建设等。临床科研一体化数据共享平台的建立，对促进中医药临床与科研数据多方平等共享、合作共赢提供了有力支撑，为中医药行业快速发展奠定了坚实基础。
【关键词】中医药;;数据共享;;数据存储;;区块链
【文献类型】 理论模型
【发表时间】2023-08-08