Follow blockchain research across journals, conferences, and preprint repositories.
8,837 results · page 331 of 369
Xu Cheng, Fulong Chen, Dong Xie, Hui Sun · 6 authors
No abstract is available for this record.
Luca Faramondi, Gabriele Oliva, Roberto Setola, Luca Vollero
No abstract is available for this record.
Bruno Tavares, Filipe Figueiredo Correia, André Restivo
The explosion of blockchain projects in last couple of years shows the general interest in the blockchain technology. Looking towards the current state of the art regarding this technology it becomes clear that the main driver of innovation is the private sector. We believe that understanding main applications of the technology, academic contributions, and private solutions can reveal where the interest in the technology exists and where it can be missing. In particular, this work can help identify open source projects that can provide a framework with next-generation features as; lightning network, directed acyclic graph, mobile compatibility, or compute protocols. New applications of the blockchain technology are still being discovered regularly and in this study several blockchain development frameworks were found. However, in the academic world there are few references to operational, testing, and deployment framework related with the technology. With the expected growth of the technology, integration with preexisting solutions, legacy systems replacement, or new implementations, the need for testing, deploying, exploration, and maintenance is expected to intensify for the technology.
Jacob Lohmer
No abstract is available for this record.
Shiping Fan, Liang Song, Chunyan Sang
No abstract is available for this record.
Cencen Wan, Shuyang Tang, Yuncong Zhang, Chen Pan · 8 authors
No abstract is available for this record.
Tariq Abdullah, Andrew Jones
This paper discusses the use of Blockchain and the Internet of Things (IoT) in the healthcare domain, identifying areas where current processes can be enhanced through the use of these new digital technologies while highlighting the issues these early developments present for an industry that is averse to risk, yet open to new technologies that improve patient safety and survival. The report discusses two uses of IoT with Blockchain as examples for the industry with many other possibilities being adoptable in a proposed single architecture that would integrate industry procedures to a common platform. While identifying technological improvements to the industry the paper also identifies the practical aspects of such a development, with varying interests across the sector, restricted funds and advancing computing power all being significant factors in whether and how to invest in such technologies. With reference to other industry attempts to make improved decisions from IoT technologies, the necessity for industry representation and leadership is seen as a significant factor in the success of any large-scale industry-wide development of a size where significant industry improvements would be achieved. While small scale isolated projects can assist individual institutions the savings industry-wide from these is likely to be much less significant than a single platform addressing total industry issues, however, the complexity in achieving this is not to be underestimated. A government body or the healthcare industry, is potentially required to coordinate the design and implementation, compiling the scope and design documentation with funding and development/implementation being provided for the industry as a whole. The paper concludes that the technologies can offer considerable technical advantages to healthcare but these are in the early stages of development. The opportunities and requirements for healthcare are significant and need early consideration and industry coordination, using existing network developments as a basis for healthcare platform designs and developed specifically to address the needs of the industry.
Meriem Guerar, Luca Verderame, Alessio Merlo, Mauro Migliardi
The market for invoice financing has been steadily growing in the last few years and has been the third financing market in size in 2016. Most solutions in this field are based on private platforms and even the new proposals based on blockchain are mostly adopting a private, permissioned blockchain. In this paper, we propose an idea based on a public blockchain that allows both fully open and group-restricted auctioning of invoices. Furthermore, our proposal introduces a reputation system that is based on the past behavior of entities, as it is photographed by the public blockchain, to allow insurance companies modulate the cost of the insurance contracts they offer. This combination guarantees the complete transparency and tamperproof-ness of a public blockchain, while it allows reducing insurance costs and fraud possibilities.
Zhedan Shao, Xiaorong Zhu, Alexander M. M. Chikuvanyanga, Hongbo Zhu
No abstract is available for this record.
Saša Pešić, Miloš Radovanović, Mirjana Ivanović, Milenko Tošić · 6 authors
No abstract is available for this record.
João C. Ferreira, Ana Martins, Frederica Gonçalves, Rui Leandro Maia
No abstract is available for this record.
Xinying Wang, Abdullah Al-Mamun, Feng Yan, Dongfang Zhao
No abstract is available for this record.
Daniel Amo-Filvà, David Fonseca, Marc Alier, Francisco José García‐Peñalvo · 5 authors
No abstract is available for this record.
Xinshu Ma, Chunpeng Ge, Zhe Liu
No abstract is available for this record.
Sara Nadeem, Muhammad Rizwan, Fahad Ahmad, Jaweria Manzoor
Cognitive radio, ad hoc networks' applications are continuously increasing in wireless communication globally. In vehicles' environment, cognitive radio technology with mobile ad hoc networks (MANETs) enables vehicles to monitor the available channels and to effectively function in these frequencies through sharing ongoing information with drivers and different frameworks to enhance traffic safety on roads. To fulfill the computational storage resources’ limitations of a specific vehicle, Vehicular Cloud Computing (VCC) is used by merging VANET with cloud computing. Cloud computing requires high security and protection because authenticate users and attackers have the same rights in VCC. The security is enhanced in CRVANETs, but the distributed nature of cloud unlocks a door for dissimilar attacks, such as trust modal, data security, connection fault and query tracking attacks. This paper proposes an effective and secured blockchain scheme-based distributed cloud architecture in place of conventional cloud architecture to secure the drivers’ privacy with low cost and on-demand sensing procedure in CRVANETs ecosystem.
Kun Hao, Junchang Xin, Zhiqiong Wang, Keyan Cao · 5 authors
Outsourced data, as significant service offered by the cloud service provider (CSP), can effectively facilitate the data owner (DO) overcoming the storage limitations on massive data. To ensure the availability of data, DO usually outsources the data replications to multiple CSPs (multi-CSPs) and utilizes a third party metadata management (TPMM) to dominate the metadata of the corresponding replications. However, during the outsourced procedures, DO can hardly confirm the confidence of the TPMM who may take some malicious behaviors to affect the reliability of data. Thus, DO inevitably faces data security issues caused by the over-reliance on the semi-trusted TPMM to manage the metadata of replications. In this paper, we focus on the problem of reliable outsourced data service among multi-CSPs in untrusted environment, that is, how to reliably store and verify the metadata of the data replications in untrusted multi-CSPs environment. To address the problem, we use the novel blockchain technology as a medium to build a trusted outsourced service platform. Moreover, we fully consider the innovative characteristics of blockchain including decentralized architecture, redundancy storage, collective maintenance, and tamper resistant to ensure the data cannot be changed maliciously. We first design a blockchain-based outsourced service framework for storing data replications in untrusted environment, which contains three key layers, that is, storage layer, verification layer, and blockchain layer. Then, we devise a novel concept of verification peer (VP) for maintaining metadata stored by a form of blockchain, and each of which holds the entire blockchain locally to prevent metadata from being maliciously tampered with. Finally, based on the proposed model, we introduce a collaborative algorithm invoked by VPs to store and verify the metadata of replications. We present a completed analysis and conduct extensive experiments on multi-CSPs scenario. The evaluation results demonstrate that our proposed approach achieves superior performance.
Samip Dhakal, Fehmi Jaafar, Pavol Zavarsky
There are various possible mechanisms for updating potentially vulnerable and exploitable software and firmware on Internet connected devices. Due to their well-known benefits, delta updates have become a common way of updating software. Recently, several authors proposed the use of blockchain technology to update software and firmware. While both delta updates and blockchain technology are now used in different areas, this paper studies the feasibility of combining the two technologies for firmware updates on resource constrained IoT devices such as Wi-Fi smart plugs and sensors. The paper identifies the scenarios where delta updates may not work and proposes a private blockchain network-based IoT device firmware integrity verification and update mechanism. The proposed private blockchain mechanism for integrity verification utilizes a tamper-proof blockchain server. The proposed solution aims to enhance firmware update performance.
Zhaohui Guo, Zhen Gao, Haojuan Mei, Ming Zhao · 5 authors
Blockchain has a broad development potential and application prospects. At present, huge storage volume on each node has become one of the primary bottlenecks that restrict the expansibility of blockchain. Optimization for storage mechanism has become a necessary way to accelerate the improvement of blockchain. There are a variety of solutions to relieve the storage burden by modifying the architecture of blockchain, but most of them weaken the decentralization property of the system, which is the core advantages of the blockchain. In this paper, an optimization scheme based on the redundant residual number system is proposed to dramatically reduce the storage volume of nodes in the blockchain system, and fault tolerance mechanism is designed based on the new storage scheme. The simulation experiments are performed to prove the effectiveness of the proposed mechanism.
Roberto Saia, Salvatore Carta, Diego Reforgiato Recupero, Gianni Fenu
The exponential growth of wireless-based solutions, such as those related to the mobile smart devices (e.g., smart-phones and tablets) and Internet of Things (IoT) devices, has lead to countless advantages in every area of our society. Such a scenario has transformed the world a few decades back, dominated by latency, into a new world based on an efficient real-time interaction paradigm. Recently, cryptocurrency has contributed to this technological revolution, whose fulcrum is a decentralization model and a certification function offered by the so-called blockchain infrastructure, which makes it possible to certify the financial transactions, anonymously. This paper aims to indicate a possible approach able to exploit this challenging scenario synergistically by introducing a novel blockchain-based distributed paradigm for data exchange between wireless-based devices defined Internet of Entities (IoE). It is based on two core elements with interchangeable roles, entities and trackers, which can be implemented by using existing infrastructures and devices, such as those related to smart-phones, tablets, and IoT systems. The employment of the blockchain-based distributed paradigm allows our approach ensuring the anonymization and immutability of the involved data, which is key in many scenarios and domains (e.g. financial applications, health and legal applications dealing with personal and sensitive data), requirements more and more searched in recent innovations. The possibility to exchange data among a huge number of devices gives rise to a novel and widely exploitable data environment, whose applications are possible in different domains, such as, in Security, eHealth, and Smart Cities.
Rafael Belchior, Miguel Correia, André Vasconcelos
No abstract is available for this record.
Qilei Ren, Ka Lok Man, Muqing Li, Bingjie Gao
Smart city blueprint is constructed by increasing deployment of various Internet of Things devices. In this paper, we focus on data transmission and request for lane property right under the domain of an intelligent traffic system. IoT devices are usually deployed in a heterogeneous environment, with the natural gene of decentralization. Compared with cloud-based centralized architecture, in this paper, we introduce blockchain as a decentralized technology to let vehicles jointly collaborate without having to go through a central computing node authority. Data transmission between vehicles uses a peer-to-peer network in which every node communicates directly with every other node, verified by their relevant end-point nodes; lane's acquisition right is approved by all relevant vehicle nodes, as well as with consensus agreed upon via smart contract.
Xiwei Xu, Ingo Weber, Mark Staples
No abstract is available for this record.
Tanweer Alam
No abstract is available for this record.
Ananda Maiti, Ali Raza, Byeong Ho Kang, Lachlan Hardy
Internet of Things (IoT) plays a big role in automating information generation and consumption in industrial monitoring applications. Blockchain can allow this information to be stored in a manner that is both accessible and reliable for the IoT devices to work with. Blockchain has the capability to collect data from IoT devices and store it in a distributed manner that prevents tampering with the data. This paper discusses the use of blockchain to calculate the Service Quality (SQ) in an Industrial IoT for monitoring application. The proposed framework looks at the blockchain as a finite number of fragmented pieces of data corresponding to a specific industrial process. The SQ is expressed as penalties which is the difference between the expected IoT sensor values and the actual sensor data in reported events from the IoT devices. It also moderates the penalty between similar industrial processes based on each other. The moderation allows better understanding of the system functions and identification of specific problems rather than simply recording the sensor data for a single process. Furthermore, this paper analyzes private blockchains for suitability in IIoT and summarizes some key challenges for IoT to be used with blockchain in context of the proposed framework. The paper uses supply chain as a use case scenario for describing the proposed framework and presents results on its technical feasibility.