【Author】 Sun, Zhongda Zhu, Minglu Shan, Xuechuan Lee, Chengkuo

【Source】NATURE COMMUNICATIONS

【影响因子】17.694

【主题类别】

区块链应用-虚拟经济-VR

【Abstract】Current wearable solutions for Virtual Reality (VR) have limitations of complicated structures and large driven power. Here, the authors report a highly integrated ring consisting of multimodal sensing and feedback units for augmented interactions in metaverse. Advancements of virtual reality technology pave the way for developing wearable devices to enable somatosensory sensation, which can bring more comprehensive perception and feedback in the metaverse-based virtual society. Here, we propose augmented tactile-perception and haptic-feedback rings with multimodal sensing and feedback capabilities. This highly integrated ring consists of triboelectric and pyroelectric sensors for tactile and temperature perception, and vibrators and nichrome heaters for vibro- and thermo-haptic feedback. All these components integrated on the ring can be directly driven by a custom wireless platform of low power consumption for wearable/portable scenarios. With voltage integration processing, high-resolution continuous finger motion tracking is achieved via the triboelectric tactile sensor, which also contributes to superior performance in gesture/object recognition with artificial intelligence analysis. By fusing the multimodal sensing and feedback functions, an interactive metaverse platform with cross-space perception capability is successfully achieved, giving people a face-to-face like immersive virtual social experience.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1038/s41467-022-32745-8

【Author】 Plechata, Adela Makransky, Guido Bohm, Robert

【Source】NPJ DIGITAL MEDICINE

【影响因子】15.357

【主题类别】

区块链应用-虚拟经济-元宇宙

【Abstract】In the metaverse, users will actively engage with 3D content using extended reality (XR). Such XR platforms can stimulate a revolution in health communication, moving from information-based to experience-based content. We outline three major application domains and describe how the XR affordances (presence, agency and embodiment) can improve healthy behaviour by targeting the users' threat and coping appraisal. We discuss how health communication via XR can help to address long-standing health challenges.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 观点阐述

【DOI】 10.1038/s41746-022-00682-x

【Author】 Pishdad-Bozorgi, Pardis Yoon, Jong Han

【Source】AUTOMATION IN CONSTRUCTION

【影响因子】10.517

【主题类别】

区块链应用-实体经济-建筑领域

【Abstract】The unethical practices of bid shopping and peddling during the subcontractor procurement process can reduce trust between the general contractor (GC) and subcontractors (Subs) and lead to low-quality work, claims and disputes, schedule delays, and cost overruns. This paper contributes to the body of knowledge by developing a framework based on a blockchain-enabled smart contract system to address these unethical practices, thus establishing the subcontracting process grounded on system-based trust. The proposed framework is demonstrated through a pilot test, and a survey with construction professionals is conducted to validate its feasibility and effectiveness. The validation results show that the framework can prevent the aforementioned unethical practices and enable Subs to fairly compete for bid awards with proper budgets. Moreover, the validation demonstrates that the framework can enhance trust between the GC and Subs. Future studies should explore the implementation of this framework in the procurement process of real-world construction projects.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Blockchain; Bid shopping; Subcontractor selection; Smart contracts; Trust

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 实验仿真

【DOI】 10.1016/j.autcon.2022.104538

【Author】 Ming, Yang Wang, Chenhao Liu, Hang Zhao, Yi Feng, Jie Zhang, Ning Shi, Weisong

【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-云计算

【Abstract】As the rapid proliferation of Internet of Things (IoT) and edge computing, large amounts of data are needed to be stored and transmitted in the online storage system. Data deduplication can be adopted to improve communication efficiency and minimize storage space. However, in edge computing, data deduplication brings security and functionality requirements that are still unsatisfied. Most existing schemes are vulnerable to brute-force attacks and single-point attacks. Moreover, they impose a heavy burden on resource-constrained edge nodes and do not support cross-domain deduplication. Blockchain is a promising technology because the programmable smart contract can be utilized to perform cross-domain deduplication and guarantee the traceability of data. In this article, an efficient dynamic cross-domain deduplication scheme in blockchain-enabled edge computing is proposed to solve the above problems. Specifically, the smart contract is employed to assist cross-domain deduplication, which also can reduce the storage pressure of edge nodes. Meanwhile, a hash proof system-based oblivious pseudorandom function is created to reduce the time cost of key generation and achieve the security requirements of resistance to brute-force attacks and single-point attacks. The technology of accumulators is adopted to achieve Proofs of Ownership (PoO), which can prevent duplicate-faking attacks. The security analysis demonstrates that the proposed scheme has a higher security level. The performance evaluation shows that the proposed scheme significantly reduces computation cost and communication overhead, compared with other existing schemes. The smart contract is implemented in the Ethereum test network (i.e., Rinkeby), which shows acceptable gas cost even the functions are called frequently.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Security; Servers; Edge computing; Cloud computing; Blockchains; Smart contracts; Internet of Things; Blockchain; data deduplication; edge computing; security and privacy; smart contract

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1109/JIOT.2022.3150042

【Author】 Wang, Ping Chen, Weiqian Sun, Zhiwei

【Source】INFORMATION SCIENCES CCF-B

【影响因子】8.233

【主题类别】

区块链技术-核心技术-共识机制

【Abstract】Consensus algorithms are the core of blockchain technology, which can cause nodes to reach consistency or liveness when there are Byzantine nodes in the network. The generation of public randomness in decentralized networks has been significantly demanding and challenging in terms of the consensus mechanism. Previously, the multi-party random number generator (mRNG), which is a mechanism for creating a single value from the contributions of decentralized multiple parties, was mainly designed based on the verifiable random function. In this study, we first construct novel, efficient verifiable mRNG protocols from any one-way function. The protocols can achieve the properties of fairness, no trusted third party, public verifiability, and manipulation resistance. Subsequently, we propose a delegated PoS (DPoS)-based consensus algorithm that adopts the verifiable mRNG. The new algorithm can solve the problem of low fairness caused by the artificial election of master nodes using DPoS, while addressing the issue of manipulating the consensus process owing to the pseudo-random number generated by the traditional RNG, thereby improving the credibility of the consensus algorithm. (c) 2022 Elsevier Inc. All rights reserved.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Verifiable random function; Verifiable random number; Consensus algorithm; Decentralized random number generation; Hash chain

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1016/j.ins.2022.07.024

【Author】 Yu, Ruiyun Oguti, Ann Move Ochora, Dennis Reagan Li, Shuchen

【Source】JOURNAL OF NETWORK AND COMPUTER APPLICATIONS CCF-C

【影响因子】7.574

【主题类别】

区块链技术-协同技术-隐私计算

【Abstract】The crowd's power, combined with the sensing capabilities of smart mobile de-vices, has resulted in the emergence of a revolutionary data acquisition paradigm known as Mobile Crowdsensing. In exchange for re-wards, mobile users collect and share location-specific data values. However, most existing crowdsensing systems built on traditional centralized architectures are highly prone to attacks, intrusions, single point of failure, manipulations, and low reliability. Recently, decentralized blockchain technologies are being applied in mobile crowdsensing systems to ensure workers' privacy, data privacy, and the quality of sensed data at a low service fee. By leveraging blockchain technology, this paper inherits the advantages of the public blockchain without the need for any trusted third-parties. We propose a smart contract-based privacy-preserving data aggregation and quality assessment protocol to infer reliable aggregated results and estimate data quality, wherein, we design a fair quality-driven incentive mechanism to distribute rewards based on the data quality. The protocol ensures a secure, cost-optimal, and reliable aggregation and estimation of the sensed data quality on the public blockchain without disclosing the sensed data's and participants' privacy. We adopt Interplanetary File Systems to offset the blockchain's expensive storage costs. Experiments were conducted using real-world datasets which were implemented on a full-stack on-chain and off-chain decentralized application on the Ethereum blockchain. The experimental results demonstrate our design is highly efficient in achieving privacy-preserving data aggregation and significantly reduces on-chain computation costs.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Mobile crowdsensing; Smart contracts; Data aggregation; Incentive mechanism; dApp; IPFS

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1016/j.jnca.2022.103483

【Author】 Yang, Chenjie Jiang, Peng Zhu, Liehuang

【Source】IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY

【影响因子】6.239

【主题类别】

区块链应用-实体经济-交通领域

【Abstract】Vehicles share information via Vehicular Ad-hoc Network (VANET) that is considered the foundation of the intelligent transportation system. Access control from functional encryption (FE) allows secure sharing over encrypted data with both utilization and privacy. However, low-powerful vehicles and the untrusted server incurs that FE-based access control mechanisms are less practical with client-side inefficiency and access unreliability. In this work, we put forth ORAC, an Optimized encrypted Access Control system with partial privacy and Reliability. ORAC is built on top of functional encryption that guarantees data partial privacy and data utilization in VANET, and separates the data access into the offline phase and the online phase, such that most of decryption computation could be done in the offline phase and vehicles could execute the real decryption efficiently. By embedding blockchain transactions into identity records and data storage, ORAC protects data accessed by vehicles from tampering and thereby manages data transfers with high reliability. It can be instantiated directly from pairing-based assumptions and features only the decryption complexity of two exponentiation and two multiplication operations. We give a formal security proof of the instantiation in the semantic security model. We also prototype our scheme by implementing ORAC over Ethereum with two types of smart contracts and the evaluation can demonstrate its efficiency optimization.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Vehicular ad hoc networks; Servers; Blockchains; Reliability; Encryption; Data privacy; Access control; Functional encryption; online; offline decryption; smart contract; VANET

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1109/TVT.2022.3174888

【Author】 Yadav, Miklesh Prasad Kumar, Satish Mukherjee, Deepraj Rao, Purnima

【Source】ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

【影响因子】5.190

【主题类别】

区块链治理-市场治理-市场分析

【Abstract】The present study is a novel attempt to unravel the connectedness of the green bond with energy, crypto, and carbon markets using the S&P green bond index (RSPGB). We consider MAC global solar energy index (RMGS) and ISE global wind energy index (RIGW) as proxies of the energy market and use bitcoin and the European energy exchange carbon index (REEX) for the cryptocurrency and carbon market. Employing the Diebold and Yilmaz (2012), Barunik and Krehlik (2018), and wavelet coherence econometric techniques, we find that the energy market (RMGS) has the highest connectedness derived from other asset classes, and bitcoin (RBTC) has the least connectedness. Concurrently, we find that the risk transmission is heterogeneous in different scales as the short period has less connectedness than the medium and long run. We conclude that the overall diversification opportunity among green bonds, energy stock, bitcoin, and the carbon market is more in the short-run than in the medium and long-run. In summary, our findings on the green bond market will provide investors, portfolio managers, and policymakers with critical insight into ensuring a sustainable financial market.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Green bond; Energy market; Cryptocurrency; Carbon market; Connectedness; Diversification

【发表时间】

【收录时间】2022-09-17

【文献类型】 实证数据

【DOI】 10.1007/s11356-022-22492-0

【Author】 Aguilera, Ricardo Carreno Ortiz, Miguel Patino Ortiz, Julian Patino Lozada, Erick Velazquez

【Source】FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY

【影响因子】4.555

【主题类别】

区块链应用-实体经济-医疗领域

【Abstract】Initial Crypto-Token Offering (ICO) strategy has worked so far to fund any project. In this scheme, the ICO launches a token playing the role of a stockholder's share; the more the people buy tokens, the more the funding for the projects. The stakeholders also earn money if the project gains more reliability and more people buy this token. In other words, an ICO strategy works based on either selling or buying of tokens in the areas of security, utility, equity, etc. However, this paper's focus is only on using oracles and Hyperledger, which means that there is no need to launch a token, instead it uses the network blockchain benefits, particularly oracles and the Ethereum virtual machine, i.e. not the Ethereum blockchain platform but its virtual machine. Since this is a proposal for governmental or corporate usage, the Hyperledger and oracles strategy fits better for this application. Funds for this use-case are gathered in the healthcare field, specifically to reduce the COVID-19 pandemic. The system's reliability is the core for attracting investors and donors to fund the system if it guarantees that resources will get to the right destiny. DAPP is based on a smart contract aligned with the smart societies concept to ensure system sustainability.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Hyperledger; Oracles; Smart Contract

【发表时间】

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1142/S0218348X22501286

【Author】 Do Nascimento, Kerolly Kedma Felix Dos Santos, Fabio Sandro Jale, Jader Silva Xavier Junior, Silvio Fernando Alves Ferreira, Tiago A. E.

【Source】FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY

【影响因子】4.555

【主题类别】

区块链治理-市场治理-市场分析

【Abstract】In this paper, we investigated the impact of the COVID-19 pandemic on the cryptocurrency market. The direction of information transfer between the 67 digital cryptocurrency markets was evaluated, in particular Bitcoin, Ethereum, Litecoin, and Ripple, and we determined which of them were the most influential in the markets. The comparison of the first half of 2019 (outside the pandemic of COVID-19) against the first semester of 2020 (during the COVID-19 pandemic) was used to analyze the pandemic influence. We found two distinct behaviors: (i) in 2019, Bitcoin, as the primary capitalization bond, presented a more substantial transfer of information than the other cryptocurrencies toward Bitcoin -> Ripple (0.0541), followed by Litecoin -> Ripple (0.0522); (ii) in 2020, the most substantial transfers of information occurred from Ethereum to other cryptocurrencies (Litecoin, Bitcoin, and Ripple, in that order). In this period, the weakest transfers happened from Litecoin Ripple and in the opposite direction, with equal value (0.0104). Our results indicate that there was a change in the direction of the information flow between the investigated cryptocurrencies, where ETH became the dominant cryptocurrency during the period of turbulence caused by the COVID-19 pandemic.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Digital Markets; Direction; Transfer Entropy; Pandemic; Coronavirus

【发表时间】

【收录时间】2022-09-17

【文献类型】 实证数据

【DOI】 10.1142/S0218348X22500992

【Author】 Jin, Chengxiang Jin, Jie Zhou, Jiajun Wu, Jiajing Xuan, Qi

【Source】IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS

【影响因子】3.691

【主题类别】

区块链治理-技术治理-异常/非法交易识别

【Abstract】While blockchain technology triggers new industrial and technological revolutions, it also brings new challenges. Recently, a large number of new scams with a "blockchain" sock-puppet continue to emerge, such as Ponzi schemes, money laundering, etc., seriously threatening financial security. Existing fraud detection methods in blockchain mainly concentrate on manual features and graph analytics, which first construct a homogeneous transaction graph using partial blockchain data and then use graph analytics to detect anomaly, resulting in a loss of pattern information. In this brief, we mainly focus on Ponzi scheme detection and propose HFAug, a generic Heterogeneous Feature Augmentation module that can capture the heterogeneous information associated with account behavior patterns and can be combined with existing Ponzi detection methods. HFAug learns the metapath-based behavior characteristics in an auxiliary heterogeneous interaction graph, and aggregates the heterogeneous features to corresponding account nodes in the homogeneous one where the Ponzi detection methods are performed. Comprehensive experimental results demonstrate that our HFAug can help existing Ponzi detection methods achieve significant performance improvement on Ethereum datasets, suggesting the effectiveness of heterogeneous information on detecting Ponzi schemes.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Feature extraction; Contracts; Behavioral sciences; Manuals; Codes; Circuits and systems; Blockchains; Ethereum; Ponzi scheme detection; heterogeneous graph; metapath

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 实验仿真

【DOI】 10.1109/TCSII.2022.3177898

【Author】 Rashid, Aqsa Khan, Atta Ur Rehman

【Source】IEEE ACCESS

【影响因子】3.476

【主题类别】

区块链技术-协同技术-物联网

【Abstract】In the Internet of Battlefield Things (IoBT), users and sensor-equipped entities send multiple messages to the Command Control Center (CCC) over the network. The authentication and integrity of these messages are crucial because if an adversary or malicious node transmits, alters, or replays these messages, the consequences will be disasters. Current centralized authentication systems are not suitable for the distributed environment because such schemes are prone to a single point of failure, privacy, and scalability issues. Moreover, the high communication overhead caused by centralization increases energy consumption. In this work, we propose a technique called Blockchain-based Autonomous Authentication and Integrity for the Internet of Battlefield Things (BIoBT) for the C3I system. The proposed technique does not require an explicit authentication channel for the authentication of entities because it is performed on the blockchain side when receiving the data. In addition, it provides data integrity and non-repudiation. BIoBT prototype is created, deployed, and tested on the Ethereum test network. The results prove that BIoBT is efficient, cost-effective, and satisfies the security requirements of a distributed environment for IoBT. BIoBT also outperforms contemporary mechanisms in terms of the number of messages required to establish a secure channel, reducing communication overhead and resource consumption.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Blockchains; Authentication; Internet; Internet of Things; Servers; Smart contracts; Robot sensing systems; Command and control systems; Military communication; Authentication; autonomous; C3I; Ethereum; Internet of Battlefield Things (IoBT); smart contract

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1109/ACCESS.2022.3201815

【Author】 Fragkos, Georgios Johnson, Jay Tsiropoulou, Eirini Eleni

【Source】ENERGIES

【影响因子】3.252

【主题类别】

区块链应用-实体经济-能源领域

【Abstract】A global transition to power grids with high penetrations of renewable energy generation is being driven in part by rapid installations of distributed energy resources (DER). New DER equipment includes standardized IEEE 1547-2018 communication interfaces and proprietary communications capabilities. Interoperable DER provides new monitoring and control capabilities. The existence of multiple entities with different roles and responsibilities within the DER ecosystem makes the Access Control (AC) mechanism necessary. In this paper, we introduce and compare two novel architectures, which provide a Role-Based Access Control (RBAC) service to the DER ecosystem's entities. Selecting an appropriate RBAC technology is important for the RBAC administrator and users who request DER access authorization. The first architecture is centralized, based on the OpenLDAP, an open source implementation of the Lightweight Directory Access Protocol (LDAP). The second approach is decentralized, based on a private Ethereum blockchain test network, where the RBAC model is stored and efficiently retrieved via the utilization of a single Smart Contract. We have implemented two end-to-end Proofs-of-Concept (PoC), respectively, to offer the RBAC service to the DER entities as web applications. Finally, an evaluation of the two approaches is presented, highlighting the key speed, cost, usability, and security features.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】distributed energy resources; Role-Based Access Control; blockchain; Ethereum; web application

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.3390/en15176375

【Author】 Xu, Chungen Zhang, Pan Mei, Lin Zhao, Yu Xu, Lei

【Source】WIRELESS NETWORKS CCF-C

【影响因子】2.701

【主题类别】

区块链技术-核心技术-加密算法

【Abstract】In the area of information retrieval, in order to improve search accuracy and reduce communication overhead, there is an increasing tendency to adopt ranked search in engines. Ranked search allows cloud servers to search for the top k most relevant documents based on the relevance score between the query keywords and the documents. Recently, with the increasing popularity of encrypted search technologies, ranked searchable encryption is proposed accordingly which focuses on solving ranked search problem over encrypted databases. However, recent studies show that some privacy protection methods commonly used in ranked searchable encryption, like order-preserving encryption (OPE), have some security problems. These problems may lead to the leakage of the relevant ranking privacy information. Meanwhile, most of the existing ranked searchable encryption schemes do not consider the problem of payment for outsourced services. In this paper, we propose a scheme called ranked searchable encryption based on differential privacy and blockchain (DPB-RSE). Specifically, we first add noise drawn from a Laplace distribution into the relevance score to disturb its value. Then we design a smart contract to verify the correctness of the results returned by the cloud server and realize payment fairness. The experiment results demonstrate that the accuracy of search results in this scheme can reach 94% in a small privacy budge.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】Differential privacy; Ranked search; Laplace distribution; Order-preserving encryption; Blockchain; Smart contract

【发表时间】

【收录时间】2022-09-17

【文献类型】 理论模型

【DOI】 10.1007/s11276-022-03109-3

【Author】 Zyda, Michael

【Source】COMPUTER

【影响因子】2.256

【主题类别】

区块链治理-法律治理-元宇宙

【Abstract】This article describes research into computational human perception's potential to be the core of a human-intelligent metaverse, a sensed world that interacts with our physical, emotional, and mental states.

你可以尝试使用大模型来生成摘要 立即生成

【Keywords】

【发表时间】2022

【收录时间】2022-09-17

【文献类型】 观点阐述

【DOI】 10.1109/MC.2022.3182035