【Author】 Rahman, Mahbubur Saifullah, Abusayeed

【Source】IEEE INTERNET OF THINGS JOURNAL CCF-C

【影响因子】10.238

【主题类别】

区块链技术-协同技术-物联网

【Abstract】Today, the audit and diagnosis of the causal relationships between the events in a trigger-action-based event chain (e.g., why is a light turned on in a smart home?) in the Internet of Things (IoT) platforms are untrustworthy and unreliable. The current IoT platforms lack techniques for transparent and tamper-proof ordering of events due to their device-centric logging mechanism. In this article, we develop a framework that facilitates tamper-proof transparency and event order in an IoT platform by proposing a Blockchain protocol and adopting the vector clock system, both tailored for the resource-constrained heterogeneous IoT devices, respectively. To cope with the unsuited storage (e.g., ledger) and computing power (e.g., proof-of-work puzzle) requirements of the Blockchain in the commercial off-the-shelf IoT devices, we propose a partial consistent cut protocol and engineer a modular arithmetic-based lightweight proof of work puzzle, respectively. To the best of our knowledge, this is the first Blockchain designed for resource-constrained heterogeneous IoT platforms. Our event ordering protocol based on the vector clock system is also novel for the IoT platforms. We implement our framework using an IoT gateway and 30 IoT devices. We experiment with ten concurrent trigger-action-based event chains while each chain involves 20 devices, and each device participates in five different chains. The results show that our framework may order these events in 2.5 s while consuming approximately 140 mJ of energy per device. The results, hence, demonstrate the proposed platform as a practical choice for many IoT applications, such as smart home, traffic monitoring, and crime investigation.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Internet of Things; Protocols; Logic gates; Blockchains; Peer-to-peer computing; Monitoring; Bitcoin; Blockchain; event order; Internet of Things (IoT); wireless network

【发表时间】2023

【收录时间】2023-04-25

【文献类型】 实验仿真

【DOI】 10.1109/JIOT.2022.3222450

【Author】 Du, Zhengyi Pang, Xiongtao Qian, Haifeng

【Source】IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING CCF-A

【影响因子】9.235

【主题类别】

区块链技术-核心技术-存储策略

【Abstract】Blockchain, a specific distributed database which maintains a list of data records against tampering and corruption, has aroused wide interests and become a hot topic in the real world. Nevertheless, the increasingly heavy storage consumption brought by the full-replication data storage mechanism, becomes a bottleneck to the system scalability. To address this problem, a reliable storage scheme named BFT-Store (Qi et al. 2020), integrating erasure coding with Byzantine Fault Tolerance (BFT), was proposed recently. While, three critical problems are still left open: (i) The complex re-initialization process of the blockchain when the number of nodes varies; (ii) The high computational overload of downloading data; (iii) The massive communication on the network. This paper proposes a better trade-off for blockchain storage scheme termed PartitionChain which addresses the above three problems, maintaining the merits of BFT-Store. First, our scheme allows the original nodes to merely update a single aggregate signature (e.g., 320 bits) when the number of nodes varies. Using aggregate signatures as the proof of the encoded data not only saves the storage costs but also gets rid of the trusted third party. Second, the computational complexity of retrieving data by decoding, compared to BFT-Store, is greatly reduced by about $2<^>{18}$218 times on each node. Third, the amount of transmitted data for recovering each block is reduced from $O(n)$O(n) (assuming $n$n is the number of nodes) to $O(1)$O(1), by partitioning each block into smaller pieces and applying Reed-Solomon coding to each block. Furthermore, this paper also introduces a reputation ranking system where the malicious behaviors of the nodes can be detected and marked, enabling PartitionChain to check the credits of each node termly and expel the nodes with misbehavior to the specific extent. Comparing with BFT-Store, our scheme allows blockchain system to suit dynamic network with higher efficiency and scalability.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Blockchains; Encoding; Peer-to-peer computing; Decoding; Computational complexity; Aggregates; Scalability; Blockchain storage; reed-solomon coding; Byzantine fault tolerance; system scalability; dynamic network

【发表时间】2023

【收录时间】2023-04-25

【文献类型】 实验仿真

【DOI】 10.1109/TKDE.2021.3136556

【Author】 Sharma, Pratima Namasudra, Suyel Crespo, Ruben Gonzalez Parra-Fuente, Javier Trivedi, Munesh Chandra

【Source】INFORMATION SCIENCES CCF-B

【影响因子】8.233

【主题类别】

区块链应用-实体经济-医疗领域

【Abstract】Nowadays, blockchain technology is one of the advanced technologies to ensure the security of users' sensitive or confidential data. Blockchain technology plays a vital role in various appli-cations like artificial intelligence, supply chain, cloud computing, the healthcare sector, and many more. It helps the healthcare domain to get benefitted from its many advanced features, such as confidentiality, decentralization, security, and privacy. Also, the Internet of Things (IoT) devices connect with the healthcare systems, and the healthcare sector application software further communicates with the IT industry. The blockchain-based IoT systems have significantly impacted the healthcare sector by enhancing security, privacy, transparency, and efficiency, providing better business opportunities. Moreover, traditional healthcare systems face severe security and privacy problems, such as phishing, masquerades, identity theft, and many others. Thus, a secure blockchain-based Proposed Application (PA) is designed to generate, maintain, and validate healthcare certificates. The PA acts as a communication medium between the backend blockchain network and application entities like hospitals, patients, doctors, and IoT devices to create and verify medical certificates. It also ensures various security features, namely confi-dentiality, authentication, and access control, using the concept of smart contracts. The comparative and performance analysis of the proposed work shows that it provides a more effective solution than the existing schemes.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Blockchain; Decentralized Application; Medical Certificate; Ethereum

【发表时间】2023

【收录时间】2023-04-25

【文献类型】 理论模型

【DOI】 10.1016/j.ins.2023.01.148

【Author】 Zhang, Yuqing Ma, Zhaofeng Luo, Shoushan Wang, Shushuang Duan, Pengfei Liu, Xiao

【Source】CONCURRENCY AND COMPUTATION-PRACTICE & EXPERIENCE

【影响因子】1.831

【主题类别】

区块链应用-实体经济-其他

【Abstract】With the rapid development of big data technology and applications, sharing and supervision of massive data have become the demand of industry development. As an emerging technology, blockchain, with excellent characteristics, can promote the prosperity and development of the data-sharing industry. However, the existing blockchain may lead to some privacy and security issues due to its transparency and lack of supervision. Hence, a secure data sharing model with supervision and privacy protection, named DBSDS, was proposed, which supports illegal content supervision and users revocation, and possesses flexible and fine-grained access control on data sharing. Firstly, it introduces a dual-blockchain architecture, one blockchain is used to ensure the integrity and traceability of private data and another is utilized to supervise illegal users so that they can no longer upload and share private data. Secondly, a key tracing tree was built and correspondingly different key generation strategies for different users were designed, which endows regulators with supervision capabilities. Finally, combined ABPER-KS algorithm, both privacy protection and fine-grained access control on private data can be accomplished. Furthermore, security analysis and performance comparison manifest that DBSDS is safe and owns better performance, and scheme implementation and experimental analysis indicate the practicality of DBSDS.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】dual-blockchain; privacy protection; proxy re-encryption; supervised data sharing

【发表时间】

【收录时间】2023-04-25

【文献类型】 实验仿真

【DOI】 10.1002/cpe.7706

【Author】 Yempally, Sangeetha Singh, Sanjay Kumar Sarveshwaran, Velliangiri

【Source】IMAGING SCIENCE JOURNAL

【影响因子】

【主题类别】

区块链应用-实体经济-医疗领域

【Abstract】Currently, healthcare services are encountering challenges, particularly in developing countries wherein remote areas encounter a lack of highly developed hospitals and doctors. IoT devices produce enormous security-sensitive data; therefore, device security is considered an important concept. The main aim of this work is to formulate a secure key generation process in the data-sharing approach by exploiting the Rider Horse Herd Optimization Algorithm (RHHO). Here, eight phases, like the initialization phase, registration phase, key generation phase, login phase, data protection phase, authentication phase, verification phase, and data decryption phase are exploited for secure and efficient authentication and multimedia data sharing. The proposed RHHO model is the integration of the Rider Optimization Algorithm (ROA) and Horse herd Optimization Algorithm (HOA). The proposed RHHO model achieved enhanced performance with a computation cost of 0.235, an accuracy of 0.935and memory usage of 2.425 MB.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Internet of things; blockchain; healthcare; authentication; multimedia data sharing; Rider Optimization Algorithm; Horse herd Optimization Algorithm; Rider Horse herd Optimization Algorithm

【发表时间】

【收录时间】2023-04-25

【文献类型】 理论模型

【DOI】 10.1080/13682199.2023.2180140