Follow blockchain research across journals, conferences, and preprint repositories.
2,631 results · page 59 of 110
Eranga Bandara, Xueping Liang, Peter Foytik, Sachin Shetty · 7 authors
No abstract is available for this record.
Haimei Xu, Yan Cheng, Zhengdong Li, Chunyan You
Abstract In this paper, we propose one content-sharing system InnerLight based on IPFS and BlockChain, which is a creation and public discussion platform about mental health. InnerLight put copies of articles from creators on IPFS to achieve distributed storage of contents and complete the first step of returning the data to creators. At the same time, it also encourages creators and readers to maintain the sustainable development of the system through blockchain-based cryptocurrency. In addition to IPFS and Blockchain, ranking algoithms contribute to make Innerlight to be a decentralized autonomous ecosystem.
Yu Zhang, Wenfeng Liu, Zhongda Xia, Zhongze Wang · 8 authors
Domain Name System (DNS) is a widely used infrastructure for remote control and batch management of IoT devices. As a critical Internet infrastructure, DNS is structured as a tree‐like hierarchy with single root zone authority at the top, which puts the operation of DNS at risk from single point of failure. The current root zone management is lack of transparency and accountability, since only the root zone file is published as the final outcome of operations inside the root zone authority. Towards distributed root zone operation in DNS, this paper presents a blockchain‐based root operation architecture—RootChain, composed of multiple root servers. On the basis of maintaining the single root authority for top‐level domain (TLD), RootChain decentralizes TLD data publication by empowering delegated TLD authorities to publish authenticated data directly. The transparency and accountability of root zone operation are attained by smart‐contracting the whole life cycle of TLD operation and logging all operations on the chain. RootChain is transparent to recursive/stub resolver and DNS/DNSSEC‐compatible. A proof‐of‐concept prototype of RootChain has been implemented with Hyperledger Fabric and evaluated by experiments.
Tani Hossain, Tasniah Mohiuddin, Al Mahmud Hasan, Muhammad Nazrul Islam · 5 authors
No abstract is available for this record.
Menglin Tao, Zhijie Wang, Shengwei Qu
In order to improve the economy and safety of multi-microgrids (MMGs) scheduling, this paper proposes a research on MMGs scheduling strategy that takes into account dynamic electricity prices based on the blockchain. We first introduce the principle of blockchain, analyze the security and economy of the combination of blockchain and MMGs scheduling, and design the scheduling architecture and process based on the blockchain platform. Second, we set a dynamic electricity price model according to the total power supply and demand of MMGs, and set a load optimization model. Finally, we take optimal system economy and minimum environmental pollution as the objective function, then use the linear programming method and the improved krill herd algorithm (KHA) with nonlinear changes in weights to solve the problem. The simulation results show that: (1) The dynamic electricity prices can reflect the power supply and demand of microgrids and optimize the load; (2) Comparing the three scheduling schemes, the strategy in this paper can improve the economic and environmental protection of MMGs by 37.33% and 39.34%, while reduce the interactive power between the microgrid and the distribution network by 56.28%, and the curtailment rate by 63.22%; (3) The improved krill herd algorithm has higher convergence speed and convergence accuracy;(4) The blockchain technology can ensure the security of scheduling data.
Samer Muneer Alshurafa, Derar Eleyan, Amna Eleyan
Blockchain provides more security and decentralised systems. However, it is difficult for startups and small companies to build and deploy their blockchain networks. So, cloud computing providers make it easy for those to work with blockchain using their networks and cloud infrastructure through using blockchain as a service platform. There are many blockchain as a service providers and platforms. This survey provides an overview of 23 blockchain-as-a-service platforms and provides a comparison based on provider, blockchain protocol, blockchain type, cost, security, and support of smart contract.
Hajra Zareen, Saba Awan, Maimoona Bint E. Sajid, Shakira Musa Baig · 6 authors
No abstract is available for this record.
Ch. Rupa, Gautam Srivastava, Thippa Reddy Gadekallu, Praveen Kumar Reddy Maddikunta · 5 authors
No abstract is available for this record.
Takaaki Yanagihara, Akihiro Fujihara
No abstract is available for this record.
Zilong Song, Xiaohong Zhang, Miaomiao Liang
A growing number of prosumers have entered the local power market in response to an increase in the number of residential users who can afford to install distributed energy resources. The traditional microgrid trading platform has many problems, such as low transaction efficiency, the high cost of market maintenance, opaque transactions, and the difficulty of ensuring user privacy, which are not conducive to encouraging users to participate in local electricity trading. A blockchain‐based mechanism of microgrid transactions can solve these problems, but the common single‐blockchain framework cannot manage user identity. This study thus proposes a mechanism for secure microgrid transactions based on the hybrid blockchain. A hybrid framework consisting of private blockchain and consortium blockchain is first proposed to complete market transactions. The private blockchain stores the identifying information of users and a review of their transactions, while the consortium blockchain is responsible for storing transaction information. The block digest of the private blockchain is stored in the consortium blockchain to prevent information on the private blockchain from being tampered with by the central node. A reputation evaluation algorithm based on user behavior is then developed to evaluate user reputation, which affects the results of the access audit on the private blockchain. The higher a user’s reputation score is, the more benefits he/she can obtain in the transaction process. Finally, an identity‐based proxy signcryption algorithm is proposed to help the intelligent management device with limited computing power obtain signcryption information in the transaction process to protect the transaction information. A system analysis showed that the secure transaction mechanism of the microgrid based on the hybrid blockchain boasts many security features, such as privacy, transparency, and imtamperability. The proposed reputation evaluation algorithm can objectively reflect all users’ behaviors through their reputation scores, and the identity‐based proxy signcryption algorithm is practical.
Zakariae Dlimi, Abdellah Ezzati, Sa飀 Ben Alla
The smart city is a technological framework that connects the city’s different components to create new opportunities. This connection is possible with the help of the Internet of Things (IoT), which provides a digital personality to physical objects. Some studies have proposed integrating Blockchain technology with IoT in different use cases as access, orchestration, or replicated storage layer. The majority of connected objects’ capacity limitation makes the use of Blockchain inadequate due to its redundancy and its conventional processing-intensive consensus like PoW. This paper addresses these challenges by proposing a NOVEL model of a lightweight Blockchain framework (IoT-SmartChain), with a lightweight consensus and a lightweight structure. The framework architecture presents a role hierarchy of connected objects according to their computational and storage capacity. This organization allows all things to be linked even indirectly via different interfaces and to benefit from the power of high-capacity objects such as Fog and Edge computing nodes. Data is validated and added to the blockchain ledger by running a lightweight consensus called Proof of Random Participation (PoRP), which reduces the blockchain nodes’ high computing power requirement. The TOPIC subscription-based data storage strategy called Assisted Selected Relevant Data in Local Ledger (ASRDLL) reduces the data size of a node’s local ledger and the entire network’s data size. This strategy is assisted by a centralized algorithm that optimizes the overall network size by adjusting the choice of TOPICS. The storage capacity, computational power, and energy consumption have been evaluated by a proof of concept implementation under NodeJS.
Abhishek Vispute, Siddhesh Patel, Yuvraj Patil, Shubham Wagh · 5 authors
No abstract is available for this record.
Uttam Kumar Roy, Weining Tang
No abstract is available for this record.
Sukriti Goyal, Nikhil Sharma, Ila Kaushik, Bharat Bhushan
No abstract is available for this record.
Shan Jiang, Jiannong Cao, Juncen Zhu, Yinfeng Cao
No abstract is available for this record.
Volker Liermann, Claus Stegmann
No abstract is available for this record.
Carlos Santiago, Shuyang Ren, Choonhwa Lee, Minsoo Ryu
In this paper, we present a novel Byzantine fault-tolerant consensus protocol for sharded blockchain networks that does not rely on expensive leader-driven communication. The proposed protocol selects a single block proposer at a time and uses threshold signatures as a voting mechanism to confirm the validity of the proposed block. By using a gossip-like communication scheme, each node can collect and recover the group signature within$\mathrm {O(log}N)$steps. With only one block proposer per consensus round, there is no possibility of conflicting blocks and resultant forks. Therefore, our consensus protocol requires only one round of one-way communication to achieve finality for each block. Our protocol guarantees safety and liveness while tolerating up to$f$faulty participants among$2f+1$nodes. Our performance study shows that the proposed protocol enables hundreds of nodes to participate in the agreement process, and can finalize large blocks in approximately 10 seconds.
M. Preetha, K Elavarasi, A.S. Radha Mani, E. Pavithra · 6 authors
No abstract is available for this record.
Hong‐Linh Truong, Filip Rydzi
No abstract is available for this record.
Abid Jamal, Muhammad Usman Gurmani, Saba Awan, Maimoona Bint E. Sajid · 6 authors
No abstract is available for this record.
Jiawei Li
To deal with a series of settlement problems such as the insufficient security for the user’s transaction, the complex process of settlement and the difficulty in data analysis within the sharing mode of the electric vehicles’ private piles, this paper proposed a new settlement mode for the shared private piles of electric vehicles. This mode took the shared charging network of the vehicle networking and the pile networking as the background, built a decentralized energy block chain, optimized the structure of the settlement mode by using distributed ledger technology, and used the intelligent contract algorithm to improve the settlement efficiency of charging orders. At the same time, this mode considered the transaction records and subsequent data analysis in its design, and used the evidence-storage and traceability technology to facilitate the integration of charging information data and to realize the configuration optimization of charging network.
J. T. Kruthik, K. Ramakrishnan, R Sunitha, Prasad B. Honnavalli
No abstract is available for this record.
V. V. Satyanarayana Tallapragada
No abstract is available for this record.
Santeri Paavolainen, Christopher Carr, Essam Ghadafi
The Ethereum blockchain is one of the most popular permissionless blockchains. A consequence of its popularity has been the growth of processing and data storage requirements for any node participating in the Ethereum blockchain network. For constrained devices such requirements are often infeasible to meet. To cater for such nodes, a so-called light protocol has been proposed for Ethereum where the responsibility of maintaining a correct state representation is delegated to light protocol servers. Previous research has identified dependence on external state management as a potential security vulnerability that exclusively impacts light nodes. Although a simple mitigation strategy is available, it comes at the expense of increased latency. In this work, we propose a new Ethereum node type, which we call a subset node, as an extension of the light protocol. Our proposal allows subset nodes to gain a lower latency than a pure light node with comparable or even higher security assurances by tracking and evaluating only a subset of all of the transactions issued on the blockchain. We provide a formal proof on the correctness of the blockchain state used by the subset node under the proposed model. To evaluate the practical feasibility of the subset node model, we analyze one year of historical transaction data from Ethereum, and demonstrate that a subset node tracking the state of a single account can achieve a significant reduction in storage and computational requirements when compared to a full node.