The importance of Cyber Threat Intelligence (CTI) lies in its ability to be shared, consumed and actioned. For threat intelligence to be actionable, it must be shared with the right audience, at the right time and mus...
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ISBN:
(纸本)9781665402859
The importance of Cyber Threat Intelligence (CTI) lies in its ability to be shared, consumed and actioned. For threat intelligence to be actionable, it must be shared with the right audience, at the right time and must fulfil quality standards. Without actionable and contextualised CTI, security teams will be making best guesses and assumptions instead of intelligence-based informed decisions. This paper proposes a decentralised, tamper-proof and reputation based solution for delivering vetted CTI information, using quality based CTI parameters in order to further evaluate the quality of CTI Feeds and the reputation of CTI Feed Sources.
At present, the application model and business model of the blockchain are still being explored. How to better integrate the blockchain technology into the power transaction business scenario to improve the quality an...
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ISBN:
(纸本)9781665464215
At present, the application model and business model of the blockchain are still being explored. How to better integrate the blockchain technology into the power transaction business scenario to improve the quality and efficiency needs to be further explored in combination with the specific business development needs. In view of the large scale of market entities and high transaction processing capabilities in the large-scale and highconcurrency power transaction business scenario, this paper studies the parallel processing technology of blockchain transactions, realizes the parallel processing of transactions, and supports the parallel reading and writing capabilities of tens of thousands of entities. Research on the blockchain consensus algorithm suitable for power trading business can shorten the transaction consensus and execution time, and ensure that the consensus mechanism meets the concurrency requirements of business responsiveness and performance requirements.
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 ...
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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.
Cascaded H-bridge converters are widely used in the implementation of medium voltage static synchronous compensators (STATCOMs). This is because of the advantages of relatively high-power density and the improved util...
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ISBN:
(纸本)9781728171609
Cascaded H-bridge converters are widely used in the implementation of medium voltage static synchronous compensators (STATCOMs). This is because of the advantages of relatively high-power density and the improved utilisation of low-voltage semiconductor devices. Major concerns with this topology are (i) to ensure a proper balance of the individual DC capacitor voltage in its cells, and (ii) the balancing of the average DC voltage between its clusters. In the research literature, these issues are typically addressed by using centralised control approaches, meaning that both an extensive processing capability and multiple digital outputs and communication channels for the switching signals are required, increasing system complexity. In contrast to this trend, in this paper, a distributed control scheme based on a consensus algorithm is proposed to deal with these issues in a three-phase STATCOM based on a cascaded H-bridge converter. The main advantages of the proposed control scheme are: (i) it does not require a centralised controller, since the cells work autonomously in a cooperative fashion to achieve voltage regulation, distributing the control effort among the cells, and (ii) it increases the fault tolerance of the converter and thus, the reliability of the system by adequately considering its redundancy. Extensive simulation work is provided to validate this proposal, and the characteristics described above.
The advancement of quantum computers and the potential polynomial-time solution of Elliptic Curve Cryptography (ECC) using the Shor algorithm pose a significant threat to blockchain security. This paper presents an ef...
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ISBN:
(纸本)9789819980239;9789819980246
The advancement of quantum computers and the potential polynomial-time solution of Elliptic Curve Cryptography (ECC) using the Shor algorithm pose a significant threat to blockchain security. This paper presents an efficient quantum-secure blockchain with our novel consensus algorithm. We integrate a post-quantum signature scheme into the transaction signing and verification process of our blockchain, ensuring its resistance against quantum attacks. Concretely, we adopt the Dilithium signature scheme, which is one of the selected algorithms in the NIST Post-Quantum Cryptography (PQC) standardization. Not surprisingly, the incorporation of a post-quantum signature scheme leads to a reduction in the number of Transactions Per Second (TPS) processed by our blockchain. To mitigate this performance degradation, we introduce a new consensus algorithm that effectively combines the Proof of Luck (PoL) mechanism with a delegated approach. We strive to build an efficient and secure blockchain for the postquantum era by benchmarking our blockchain, adjusting the security parameters of Dilithium, and refining the components of the consensus algorithm.
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 wit...
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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.
In this paper, a blockchain consensus algorithm tailored to Internet of Vehicles (IoV) environment is proposed to solve the deficiencies of traditional consensus algorithms such as high latency, low throughput and exc...
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ISBN:
(纸本)9798350377675;9798350377682
In this paper, a blockchain consensus algorithm tailored to Internet of Vehicles (IoV) environment is proposed to solve the deficiencies of traditional consensus algorithms such as high latency, low throughput and excessive resource consumption. The proposed approach adopts a hybrid consensus algorithm, which combines the Delegated Proof of Stake (DPoS) algorithm with the Practical Byzantine Fault Tolerance (PBFT) algorithm. This hybrid algorithm elects representative nodes via a voting mechanism to execute the verification process. Simulation results demonstrate that the consensus algorithm delineated in this paper outperforms traditional consensus algorithms in terms of latency and throughput, rendering it better suited for IoV-related scenarios.
The Internet of Things (IoT) and Blockchain are increasingly growing focus on research. Blockchain is like the Internet when we first knew of it. This new technology could revolutionize how we do everything. Seriously...
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ISBN:
(纸本)9781728130446
The Internet of Things (IoT) and Blockchain are increasingly growing focus on research. Blockchain is like the Internet when we first knew of it. This new technology could revolutionize how we do everything. Seriously, everything. Think how the Internet changed our daily lives today. And just like that, we don't really have to understand the technology behind it and be knowledge of its importance. But what makes this innovation revolution a bigger deal than Bitcoin and possibly even the Internet itself, are the exponential opportunities the concept provides. However, the potential to integrated Blockchain to Internet of Things (IoT) has constraint due to the required high computational power. IoT comprises of numerous platforms which have limited performance. Usually, these platforms cannot handle intensive procedures and often has scalability issues. In this paper, we give an overview of consensus algorithms and the necessity of this method to blockchain technology. Moreover, we focused on three of the utmost common consensus algorithms used in blockchain technology and explore their potential adaptation in an IoT framework with respect to its requirements.
The agent based solutions are successfully applied in research and have impressive results. However, at the present, the agent technology is the realm of theory and laboratory simulation. The paper presents an attempt...
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ISBN:
(纸本)9781479902248
The agent based solutions are successfully applied in research and have impressive results. However, at the present, the agent technology is the realm of theory and laboratory simulation. The paper presents an attempt to bridge the gap. To facilitate migration of agent technology to the field, we propose to apply industrial standards such as IEC 61499 to design and implement the agent based algorithms. IEC 61499 is reference architecture for development of distributed systems. As an example of agent based solution to power system problem we consider Incremental Cost consensus (ICC) algorithm for solving economic dispatch problem. The original system was simulated in Matlab. The agent based 5 node system was developed using IEC 61499 and deployed to 5 industrial controllers, then tested. With the proposed approach the agent algorithms can be designed, tested and deployed within one framework without the overhead of re-coding the solution for different stages. The proposed approach enables directly executable agent solutions and paves the way to the industrial adoption of the agent technology in power system domain.
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 ...
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ISBN:
(纸本)9781538612446
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. Filially, an example is given to illustrate the effectiveness of proposed algorithm.
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