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Raft consensus algorithm Based on Credit Model in Consortium Blockchain

Wuhan University Journal of Natural Sciences 2020年第2期25卷 146-154页

作者： CHEN Yunfang LIU Ping ZHANG Wei School of Computer Science Nanjing University of Posts and TelecommunicationsNanjing 210023JiangsuChina Jiangsu Key Laboratory of Big Data Security and Intelligent Processing Nanjing University of Posts and TelecommunicationsNanjing 210023JiangsuChina

As one of the underlying technologies of the blockchain,the consensus algorithm plays a vital role in ensuring security and *** a consensus algorithm for the private blockchain,Raft has better performance than the rest of the consensus algorithms,and it does not cause problems such as the concentrated hashing power,resource waste and ***,Raft can only be used in a non-byzantine environment with a small network *** order to enable Raft to be used in a large-scale network with a certain number of byzantine nodes,this paper combines Raft and credit model to propose a Raft blockchain consensus algorithm based on credit model *** the node credit evaluation phase,RBF-based support vector machine is used as the anomaly detection method,and the node credit evaluation model is *** the Trust Nodes List(TNL)mechanism is introduced to make the consensus phase in a creditable network ***,the common node is synchronized to the consensus node to update the blockchain of the entire *** show that CRaft has better throughput and lower latency than the commonly used consortium blockchain consensus algorithm PBFT(Practical Byzantine Fault Tolerance).

关键词： credit model consensus algorithm consortium blockchain P2P network

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A Distributed Cooperative Control Strategy Based on consensus algorithm in DC Microgrid 13

A Distributed Cooperative Control Strategy Based on Consensu...

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13th IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Zhang, Xinlu Dong, Mi Ou, Jing Cent S Univ Dept Informat Sci & Engn Changsha Hunan Peoples R China

ISBN: (纸本)9781538637586

A distributed cooperative control strategy based on the consensus algorithm is proposed for the voltage regulation and load distribution in DC microgrid. Global information can be accurately shared in a distributed fashion by using a consensus protocol. At the secondary control level, the average voltage and current controllers are used in each converter to generate two correction terms to adjust the voltage set point for the local droop controller. Using this method can achieve DC bus voltage recovery and eliminate average voltage deviation, while ensuring proportional load sharing among sources. By introducing a proportional adjustment link in the current controller, the load sharing is optimized while balancing the cost of power generation. The effectiveness of the proposed control scheme is verified by detailed MATLAB / Simulink simulation.

关键词： DC microgrid distributed control droop control consensus algorithm voltage control

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Blockchain-Enabled Cyber-Secure Microgrid Control Using consensus algorithm 22

Blockchain-Enabled Cyber-Secure Microgrid Control Using Cons...

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22nd IEEE Workshop on Control and Modelling of Power Electronics (COMPEL)

作者： Mahmud, Rasel Seo, Gab-Su Natl Renewable Energy Lab Power Syst Engn Ctr Golden CO 80401 USA

ISBN: (纸本)9781665436359

This paper proposes a distributed control method based on a consensus algorithm for distributed energy resources (DERs) using blockchain as a secure communication medium for cyber resilience. Each DER communicates with a local blockchain server that is maintained by the distributed ledger technology to allow for securely sharing local measurements among neighbouring assets to achieve the global control objectives, i.e., voltage and frequency regulation as well as accurate power sharing among the DERs, including collective grid-forming capability. To prove that the distributed control can retain system stability under a blockchain-induced variable communication delay, Lyapunov function-based stability analysis is carried out. This paper demonstrates the concept on an 11-bus test case developed in MATLAB Simulink, which has been modified from the IEEE 9-bus test case, to study dynamic operations of the five inverter-based DERs working with a blockchain-induced variable delay. The results validate the superior performance of the proposed control method, compared to heavily compromised operations of the other test cases without the security measure, affected by heavy communication delays and communication interruptions.

关键词： Voltage measurement Software packages consensus algorithm Stability analysis Delays Blockchains Security

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Tree-Chain: A Lightweight consensus algorithm for IoT-based Blockchains 3

Tree-Chain: A Lightweight Consensus Algorithm for IoT-based ...

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3rd IEEE International Conference on Blockchain and Cryptocurrency (IEEE ICBC)

作者： Dorri, Ali Jurdak, Raja Queensland Univ Technol QUT Sch Comp Sci Trusted Networks Lab Brisbane Qld Australia

ISBN: (纸本)9781665435789

In this paper, we propose Tree-chain a fast scalable consensus algorithm that bases the validator selection on an existing function in relatively all existing blockchains: hash function output. Tree-chain is a leader selection consensus algorithm that moves away from a linear blockchain structure, to a tree-structured blockchain where each branch is managed by a particular validator. Each validator is periodically allocated to a random consensus code range which matches specific patterns of the most significant bits of the hash function output. Each validator is then responsible for transactions whose hash falls within the consensus code allocated to the validator. Because transactions are allocated deterministically to validators based on random consensus code allocations, Tree-chain eliminates the significant inefficiency of conventional blockchains for validator selection, such as proof-of work. Tree-chain does not require the validators to follow any additional algorithms before committing blocks which in turn significantly increases its throughput. Implementation results show that Tree-chain can run on small tiny IoT devices with limited resources which in turn highlights its resource efficiency.

关键词： Blockchain Internet of Things (IoT) consensus algorithm Scalability

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Application and Research of Heterogeneous Computing in Ethereum consensus algorithm 13

Application and Research of Heterogeneous Computing in Ether...

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13th IEEE International Conference on Anti-Counterfeiting, Security, and Identification (ASID)

作者： Peng, Huwan Ling, Chaodong Li, Yongjie Huaqiao Univ Coll Informat Sci Engn Xiamen Peoples R China Halley Cloud Technol Co Ltd Shenzhen Peoples R China

ISBN: (纸本)9781728124582

This paper researches the consensus mechanism of Ethereum, focusing on the analysis and research of the consensus algorithm. The consensus algorithm is the kernel of Ethereum implementation, which is the most computationally intensive, time-consuming and occupies much memory. The concrete implementation architecture and method of heterogeneous operation are analyzed and implemented on the Xilinx ZCU106 platform. Finally, the verification content has been obtained.

关键词： heterogeneous computing Ethereum consensus algorithm

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consensus algorithm-Based Approach to Fundamental Modeling of Water Pipe Networks

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AICHE JOURNAL 2017年第9期63卷 3860-3870页

作者： Lee, Shin Je Lee, Jong Min Wu, Jingbo Allgower, Frank Suh, Jung Chul Lee, Gibaek Seoul Natl Univ Inst Chem Proc Sch Chem & Biol Engn Seoul 08826 South Korea Univ Stuttgart Inst Syst Theory & Automat Control D-70569 Stuttgart Germany Samchully Corp Seoul 07328 South Korea Korea Natl Univ Transportat Dept Chem & Biol Engn Chungju Si 27469 Chungbuk South Korea

Modeling the flow dynamics of leaks in water pipe networks is an extremely difficult problem due to the complex entangled network structure and hydraulic phenomenon. A mathematical model for leak dynamics in water pipe networks based on consensus algorithm and water hammer theory is proposed. The resulting model is a simple and linearly interconnected system even though the dynamics of water pipe networks has considerable complexity. The model is then validated using experimental data obtained from real pipe network. A comparative study demonstrates the proposed model can describe the real system with high qualitative and quantitative accuracy and it can be used to develop model-based leak detection and location algorithm based on state estimation. To show applicability of the proposed model, we apply cooperative H-infinity estimation to the developed model. The results demonstrate the consensus-based pipe model can be potentially used for leak detection and location with state estimation. (C) 2017 American Institute of Chemical Engineers

关键词： mathematical modeling water pipe networks consensus algorithm fault diagnosis state estimation

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A Pattern for Proof of Work consensus algorithm in Blockchain 26

A Pattern for Proof of Work Consensus Algorithm in Blockchai...

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European Conference on Pattern Languages of Programs (EuroPLoP)

作者： Ul Abadin, Zain Syed, Madiha Haider Quaid I Azam Univ Inst Informat Technol Islamabad Pakistan

ISBN: (纸本)9781450389976

Blockchain technology has gained immense popularity over the last decade. It has transformed several industries by enabling processes to work in a secure and decentralized manner. Blockchain consists of blocks that are linked together through cryptography. Blockchain is a distributed ledger that contains a set of sequenced blocks of data. Each block records transaction data in a transparent, immutable, and secure fashion. consensus algorithm is the key part of this technology as it is used for the decision-making process among nodes in the blockchain network. Nodes in the verifying network use consensus algorithm to reach mutual agreement about state of the blockchain whenever a new block is added. This makes it possible to accept any transaction in the blockchain. Many consensus algorithms have been proposed in the literature each having its own performance and security characteristics. In this paper, we present a pattern for one of the most widely used blockchain consensus algorithms, which is the Proof of Work (PoW) algorithm. This paper is a part of our project on blockchain architecture and patterns.

关键词： Blockchain consensus algorithm Architectural pattern Security validation mechanism

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ISRaft consensus algorithm for Autonomous Units 29

ISRaft Consensus Algorithm for Autonomous Units

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29th IEEE International Conference on Network Protocols (ICNP)

作者： Zamir, Linir Shaan, Aman Nojoumian, Mehrdad Florida Atlantic Univ Dept Elect Engn & Comp Sci Boca Raton FL 33431 USA

ISBN: (纸本)9781665441315

consensus protocols are a key feature in decentralized systems where multiple unreliable nodes operate, e.g., in Blockchain technologies with many worldwide applications such as supply chain management, cryptocurrencies and information sharing. ISRaft is a consensus protocol built upon Raft, a previously developed protocol that is used for replicated state machines when a group of nodes is required to achieve a consensus related to the state of the machine. This paper therefore proposes an alternative version of the ISRaft consensus protocol to allow communication among nodes in a secured fashion while maintaining the security features of the original ISRaft algorithm even in the presence of adversarial nodes. The proposed model utilizes a trust parameter to enforce cooperation, i.e., a trust value is assigned to each node to prevent malicious activities over time. This is a practical solution for autonomous units with resource-constrained devices where a regular encrypted communication method can negatively affect the system performance.

关键词： consensus algorithm Autonomous System Blockchain Technology Trust Model Raft

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Unmanned Aerial Vehicle Formation consensus algorithm Based on Virtual Relative Position Errors 11

Unmanned Aerial Vehicle Formation Consensus Algorithm Based ...

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11th International Conference on Intelligent Human-Machine Systems and Cybernetics (IHMSC)

作者： Huang, Wei Dong, Wenliang Lu, Yi Li, Zhanwu Air Force Engn Univ Aeronaut Engn Coll Xian 710038 Peoples R China Xiamen Tobacco Ind Ltd Liabil Co Xiamen 361000 Peoples R China

ISBN: (纸本)9781728118598

To solve the problem of existing consensus algorithms converging to the same equilibrium point, a new consensus algorithm for unmanned aerial vehicle formation is proposed. By constructing virtual relative position errors, this algorithm's equilibrium point isn't determined by initial states and it can make all members approaching to ideal positions as well as consistent velocity. Based on algebraic graph theory, the topological conditions and parameter conditions required by algorithm convergence are derived. Simulation results verify the validity of this algorithm which is suitable for general design of unmanned aerial vehicle formation system.

关键词： unmanned aerial vehicle formation consensus algorithm position errors algebraic graph theory

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Scalable Network-Coded PBFT consensus algorithm

Scalable Network-Coded PBFT Consensus Algorithm

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IEEE International Symposium on Information Theory (ISIT)

作者： Choi, Beongjun Sohn, Jy-yong Han, Dong-Jun Moon, Jaekyun Korea Adv Inst Sci & Technol Sch Elect Engn Daejeon South Korea

ISBN: (纸本)9781538692912

We suggest a general framework for network-coded Practical Byzantine Fault Tolerant (PBFT) consensus for enabling agreement among distributed nodes under Byzantine attacks. The suggested protocol generalizes existing replication and sharding schemes which are frequently used for consensus in current blockchain systems. Using the proposed algorithm, it is possible to reach a consensus when the available bandwidth is considerably smaller on individual links compared to that required for conventional schemes. It is shown that there exists an upper bound on the number of nodes that can participate in the protocol, given a maximum bandwidth constraint across all pairwise links. Furthermore, the protocol that achieves the upper bound is provided by using a set of constant weight codes.

关键词： Bandwidth Upper bound consensus algorithm Scalability Hamming distance

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