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检索条件"主题词=Consensus algorithm"

共 2600 条记录，以下是271-280 订阅

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CT-PBFT: A Comprehensive Trust-Based Practical Byzantine consensus algorithm

CT-PBFT: A Comprehensive Trust-Based Practical Byzantine Con...

引用

International Conference on Computer and Communications (ICCC)

作者： Yufei He Siyuan Du Shuaifan Xia Yingkang Zhong Qingwen Liu Chunqi Tian Wen Fang Mingliang Xiong College of Computer Science and Technology Tongji University Shanghai China Shanghai Research Institute for Intelligent Autonomous Systems Tongji University Shanghai China College of Electronic and Information Engineering Tongji University Shanghai China

ISBN: (数字)9798331507077

ISBN: (纸本)9798331507084

Blockchain technology has become a foundational component for constructing decentralized, secure, and immutable distributed systems. The consensus mechanism ensures that all nodes in a blockchain network reach agreement on a single version of truth, thereby maintaining data consistency across the distributed ledger. The earliest blockchain application, Bitcoin, adopts Proof of Work (PoW), which provides high security at the cost of substantial computational power and energy consumption. Ethereum employs Proof of Stake (PoS) to reduce energy consumption, though it introduces new challenges in the fairness of node selection. Practical Byzantine Fault Tolerance (PBFT) has gained significant attention for its ability to achieve more efficient consensus by reducing computational and energy demands. However, traditional PBFT still requires extensive message exchanges and voting among nodes, leading to significant communication overhead in large-scale networks. To address these limitations and further enhance the performance of PBFT, we propose the Comprehensive Trust-based PBFT (CTPBFT) algorithm. CT-PBFT reduces communication overhead by excluding nodes with low trust scores from the consensus process, thereby optimizing overall efficiency. We conducted a thorough analysis and simulation of CT-PBFT, and the results demonstrate that CT-PBFT outperforms traditional PBFT in terms of consensus latency and throughput. Moreover, CT-PBFT is more effective than other trust-based PBFT variants in swiftly eliminating Byzantine nodes, providing a robust and efficient solution for secure communication in distributed systems.

关键词： Energy consumption Proof of stake Fault tolerance Distributed ledger Fault tolerant systems consensus algorithm Throughput Proof of Work Blockchains consensus protocol

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Improved Raft consensus algorithm based on NSGA-II and K-Means++

Improved Raft consensus algorithm based on NSGA-II and K-Mea...

引用

International Symposium on System and Software Reliability (ISSSR)

作者： Sijia Yang Pengliu Tan Haowei Fu Nanchang Hangkong University Nanchang City China

ISBN: (数字)9798350362930

ISBN: (纸本)9798350362947

Aiming at the problems of inefficient leader election, high leader node carrying pressure, and low scalability of blockchain network of Raft consensus algorithm, an improved Raft consensus algorithm-NK-Raft is proposed. The multi-objective function is established during the leader election phase, and the NSGA-II algorithm is utilized to conduct the leader election directly. By doing this, the election efficiency is increased, and time-wasting several rounds of leader node competition in the Raft consensus process are avoided. In order to decrease the load-bearing pressure on the leader nodes and increase the scalability of the blockchain network, the tightness value is proposed to stratify the network during the log replication phase. The K-Means++ algorithm is then introduced to group the node clusters in the blockchain network. The experimental study’s findings demonstrate that, in comparison to the Raft consensus algorithm and the MCRaft algorithm, the NK-Raft algorithm reduces the election and consensus delays of the leader node as the blockchain network scales up, increases throughput, significantly lessens the load-bearing pressure on the leader node, has better scalability, and guarantees the blockchain network’s performance.

关键词： Voting Scalability Fault tolerant systems Clustering algorithms consensus algorithm Throughput Blockchains

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Improvement and Application of Blockchain consensus algorithm for Distributed Power Energy System

Improvement and Application of Blockchain Consensus Algorith...

引用

IEEE International Conference on Big Data Analysis (ICBDA)

作者： Junlong Liang Xiangzhi Liu Xiaoming Wu Ran Chen Shandong Computer Science Center (National Supercomputer Center in Jinan) Qilu University of Technology ( Shandong Academy of Sciences) Jinan China

This article focuses on the application of blockchain consensus algorithms in the power energy trading system and the comparison of these algorithms such as PBFT(Practical Byzantine Fault Tolerance), Raft and IBFT(Istanbul Byzantine Fault Tolerance). The article introduces the concept of blockchain consensus algorithms and its application in power energy trading system. It then provides a brief overview of the three algorithms and their underlying structures. The comparison of the algorithms is done in terms of features such as scalability, reliability and security. The article also provides an overview of the advantages and disadvantages of each algorithm and its application in power energy trading system. We examine the blockchain partition algorithm improved by the integration of Raft consensus and IBFT consensus, with a special focus on the advantages of using a hybrid algorithm in distributed networks. We discuss the need for consensus algorithms that are well-suited to blockchain networks and the improved security provided by a consensus algorithm incorporating both Raft and *** also discuss the implications of incorporating Raft and IBFT into a blockchain partition algorithm and its potential scalability. In conclusion, we provide a synthesis of our research, with potentials for further studies and contributions in this field.

关键词： Fault tolerance Scalability Fault tolerant systems consensus algorithm Big Data Throughput Hybrid power systems

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CBDC consensus algorithm design choice 23

CBDC consensus algorithm design choice

引用

Proceedings of the 2023 6th International Conference on Blockchain Technology and Applications

作者： Anastasia Tsareva Yash Madhwal Yury Yanovich Graduate School of Business HSE University Russia Skolkovo Institute of Science and Technology Russia Skolkovo Institute of Science and Technology Russia and Faculty of Computer Science HSE University Russia

ISBN: (纸本)9798400708671

In this paper, we analyze the decentralization features of Central Bank Digital Currencies (CBDCs) and evaluate the limitations of Distributed Ledger Technology (DLT) benefits in this context. Our research explores the essential characteristics of consensus algorithms, including security, finality, and efficiency, for CBDCs and considers the trade-off between transaction throughput and decentralization. After examining various options, we conclude that Proof of Work (PoW) and Proof of Stake (PoS) are unsuitable for CBDCs. However, Proof of Authority (PoA), Delegated Proof of Stake (DPoS), and Notary Services are promising alternatives. Our findings reveal that while CBDCs possess some decentralization components in their architecture, they still maintain political and logical centralization due to regulation by the Central Bank. Consequently, CBDCs can only partially leverage all the benefits of DLT, such as the ability to withstand challenges, which still depend on the Central Bank as the sole point of failure. This paper aims to equip policymakers with valuable insights to make informed decisions regarding the design of CBDC consensus algorithms.

关键词： CBDC DLT consensus algorithm design choice

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The Cleisthenes Protocol: A Fair Governance-Based Democratic consensus algorithm

The Cleisthenes Protocol: A Fair Governance-Based Democratic...

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International Symposium on Symbolic and Numeric algorithms for Scientific Computing (SYNASC)

作者： Togoe Nicolae-Bogdan-Cristian Ciprian Pungila Faculty of Informatics West University Timisoara Romania

ISBN: (纸本)9781665406512

Due to the high interest in the past few years, blockchain technology benefited from a fast increase in adoption rate as well as fast evolution. One of the crucial points in the blockchain space, the consensus mechanism, generally still suffers from lack of development, thus decreasing the adoption of the technology in big scale projects and daily use. Older-established consensus algorithms, such as Proof of Work (PoW) and Proof of Stake (PoS), suffer from various flaws, ranging from the high costs of maintaining a node in the network and generating new blocks, to the risk of being affected by a series of attacks, as well potential of network monopoly by various entities. This paper proposes a model of a democratically-governed consensus algorithm that is focused on a fair distribution of assets, with a fast and secure way of validating and distributing the blocks, while being impervious to a sizeable range of attacks.

关键词： Scientific computing Network topology Scalability consensus algorithm Proof of Work Distance measurement Blockchains

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A consensus algorithm-Based Power Dispatch Method with the Consideration of Power Outage in Smart Home

A Consensus Algorithm-Based Power Dispatch Method with the C...

引用

第30届中国控制与决策会议

作者： Yiying Li Qihe Shan Tieshan Li Navigation College Dalian Maritime University

This paper investigates a consensus algorithm-based power dispatch problem when the power outage happens in the intelligent household. Energy storage devices are added in power grids to support the electricity supply while taking power outages into consideration. According to the need of using electrical appliances caused by the different power outage periods lengths, the establishment of smart home load model and the load shedding judgment are proposed. When the different energy storage devices are used to provide electricity, a consensus algorithm is proposed for the power dispatch. Finally, an example is given to illustrate the effectiveness of proposed algorithm.

关键词： Power outage Energy storage device consensus algorithm Power dispatch Multi-agent system

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AC-PBFT:An Authority and Credibility based PBFT consensus algorithm

AC-PBFT:An Authority and Credibility based PBFT Consensus Al...

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Blockchain Technology and Information Security (ICBCTIS), International Conference on

作者： Xueqing Zhao Sanyuan Wang Xin Shi Yun Wang Guigang Zhang Shaanxi Key Laboratory of Clothing Intelligence School of Computer Science Xi'an Polytechnic University Xi'an Shaanxi China Chinese Academy of Sciences Institute of Automation Beijing China

ISBN: (数字)9798331528324

ISBN: (纸本)9798331528331

For the consensus mechanism in the blockchain, an authority and trust-based PBFT consensus algorithm for blockchain is proposed in this paper, short for AC-PBFT. Firstly, a novel credit scoring model is constructed, employing a proportional probability block generation model to enhance the fairness of the permissioned chain, which is used to incentivize the permissioned chain in the credit scoring model. Secondly, a biased credit scoring mechanism is designed to selectively filter out credit nodes with bias. Meanwhile, a proportional probability block generation mechanism is added to give nodes with fewer credits a chance to generate blocks. Finally, simulation tests are conducted on nodes with different identities and behaviors. Experimental results demonstrate that the proposed AC-PBFT has certain fairness and decentralized block generation performance in this paper.

关键词： Fault tolerance Limiting Costs Fault tolerant systems Information security consensus algorithm consensus protocol

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Improvement of Practical Byzantine Fault Tolerant consensus algorithm Based on Reputation Evaluation and Threshold Signature

Improvement of Practical Byzantine Fault Tolerant Consensus ...

引用

Blockchain Technology and Information Security (ICBCTIS), International Conference on

作者： Xiaobao Long Xiaofang Wang Pengfei Lu Jiaquan Song Zitong Shao College of Information Science and Technology Shihezi University Shihezi China

ISBN: (数字)9798331528324

ISBN: (纸本)9798331528331

Blockchain ensures data consistency and security through consensus algorithms. The PBFT is a consensus mechanism frequently applied in consortium blockchains. However, PBFT encounters performance bottlenecks when handling a substantial number of nodes, thereby significantly constraining its applicability in blockchain systems. This paper proposes an enhanced PBFT algorithm called RT-PBFT. The algorithm designs a reputation model to assess the credibility of nodes, then groups nodes based on the evaluation results, and subsequently divides the consensus process into intra-group and inter-group consensus, thus improving overall consensus efficiency. Additionally, a threshold signature mechanism is incorporated to optimize intra-group consensus, effectively reducing the communication overhead among nodes. The performance of RT-PBFT algorithm is verified through comparative experiments with traditional PBFT and G-PBFT algorithm. The experimental results demonstrate that the RT-PBFT algorithm reduces transaction latency and enhances throughput.

关键词： Fault tolerance Scalability Fault tolerant systems Evaluation models Information security consensus algorithm Throughput consensus protocol

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Blockchain consensus algorithm Using Cellular Networks Location Services

Blockchain Consensus Algorithm Using Cellular Networks Locat...

引用

International Conference on Engineering and Emerging Technologies (ICEET)

作者： Andrei-Vlad Constantin Automation Delivery Realworld Systems Eastern Europe Bucharest Romania

ISBN: (数字)9798331532895

ISBN: (纸本)9798331532901

This paper proposes an innovative block validation algorithm for blockchain solutions using cellular network location services. The concept involves using the range of telecommunications signal antennas combined with end-user device position, provided by location services, to generate and solve the consensus task, which involves a race-like challenge with the winner being rewarded, as an additional incentive.

关键词： Cellular networks consensus algorithm consensus protocol Telecommunications Antennas

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A Reputation-Aware Randomization consensus algorithm for Performance Optimization in Blockchain Systems

A Reputation-Aware Randomization Consensus Algorithm for Per...

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International Conference on Computer Supported Cooperative Work in Design

作者： Jingyu Zhang Yongtao Sun Zhennan Zhang Weifeng Ren Lailong Luo School of Computer and Communication Engineering Changsha University of Science and Technology Changsha China Science and Technology on Information Systems Engineering Laboratory School of Systems Engineering National University of Defense Technology Changsha China

ISBN: (数字)9798350349184

ISBN: (纸本)9798350349191

Blockchain technology, due to its decentralized, traceable, and tamper-resistant characteristics, has been applied in a wide range of collaborative computing scenarios, including smart grid, industrial production, and smart cities. consensus algorithm, as the key blockchain technology, plays a decisive role in terms of performance, security, and scalability, ensuring that system nodes reach consensus on transaction data. However, with the increase of user nodes and the diversity of application scenarios, existing consensus algorithms face some performance and security challenges. To overcome these challenges, this article proposes a novel blockchain consensus mechanism, namely the Reputation-Aware Randomization consensus algorithm (RRCA). The proposed mechanism first constructs a dynamic reputation evaluation model to divide nodes into ordinary ones and candidate ones. Secondly, a selection model is constructed for candidate nodes to select consensus nodes, which run the consensus algorithm. Finally, a random selection mechanism for the leader node of the proposed consensus algorithm is constructed to ensure the unpredictability and reduce the probability of the leader node being subjected to malicious attacks. Theoretical analysis and experimental results indicate that the RRCA can significantly reduce consensus latency and increase the unpredictability of the leader node, which improves the performance and security of blockchain systems.

关键词： Smart cities Federated learning Scalability Evaluation models consensus algorithm Production Blockchains

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