Academic literature on the topic 'Blockchain'

This research aimed to identify and investigate the most important issues with blockchain and blockchain-related technology which are potentially slowing down its adoption. A literature review was performed to identify and analyze issues in usability, security, scalability, regulations, and other relevant areas. A qualitative research based on semi-structured interviews with two groups of participants, end users and developers, was conducted and the collected data that were analysed with the thematic analysis method, revealed the most commonly experienced issues confirming many findings from the existing literature, while providing a more up to date understanding of some others.

Cette thèse s'inscrit à l'avant-garde de la logistique maritime et explore le potentiel transformateur de la technologie blockchain pour améliorer la traçabilité de la chaîne d'approvisionnement et faciliter l'échange de données sécurisé et multi-source. À travers une analyse approfondie des applications de la blockchain, ce travail de recherche examine méticuleusement comment cette technologie émergente peut contribuer de manière significative à renforcer la transparence, la traçabilité et la sécurité au sein du commerce international. En s'appuyant sur un cadre théorique complet et des études de cas concrets, cette étude universitaire met en lumière les défis et les opportunités à multiples facettes liés à l'intégration de la blockchain dans la logistique maritime. Elle évalue de manière critique l'impact de cette technologie sur la traçabilité des données critiques au sein des systèmes d'information maritimes, telles que les marchandises dangereuses et les journaux d'identification, avec le potentiel de s'étendre à un échange de données inter et intra plus large. Cette thèse vise non seulement à enrichir les connaissances universitaires, mais également à servir d'appel à l'action pour les innovateurs et les décideurs politiques des secteurs maritime et technologique. Elle préconise une approche innovante qui favorise un engagement plus profond avec les possibilités de transformation offertes par la blockchain. Cette approche considère la blockchain non pas comme un substitut, mais comme une couche complémentaire aux systèmes d'information maritime existants. Elle envisage une intégration et une utilisation transparentes d'une technologie blockchain personnalisée et évaluée au sein du secteur maritime, garantissant ainsi sa cohérence avec les exigences spécifiques de l'industrie et les tendances actuelles de numérisation. Ce travail de recherche vise à fournir des éclairages qui permettent de mieux comprendre les implications de la technologie blockchain pour le paysage en évolution du commerce et de la logistique mondiaux<br>At the forefront of maritime logistics, this dissertation explores the transformative potential of blockchain technology to enhance supply chain traceability and facilitate secure, multi-source data exchange.Through a deep analysis of blockchain applications, the research meticulously examines how this emerging technology can significantly elevate transparency, strengthen traceability, and fortify security within the global trade arena. By weaving together a comprehensive theoretical framework and real-world case studies, this scholarly endeavour sheds light on the multifaceted challenges and opportunities associated with integrating blockchain into maritime logistics. It critically evaluates the technology's impact on the traceability of critical data within maritime information systems, such as dangerous goods and identification logs, with the potential to extend to broader inter- and intra-data exchange. This dissertation not only contributes to academic knowledge but also serves as a compelling call to action for innovators and policymakers in the maritime and technology sectors. It advocates for an innovative approach that fosters deeper engagement with the possibilities of blockchain-driven transformation. This approach views blockchain not as a replacement, but as a complementary layer to existing maritime information systems. It envisions seamless integration and utilization of customized and evaluated blockchain technology within the maritime sector, ensuring its coherence with industry-specific requirements and ongoing digitization trends. This research aims to provide insights that enhance the understanding of blockchain technology's implications for the evolving global trade and logistics landscape

Blockchain è una tecnologia per la condivisione di dati, decentralizzata, tansazionale ed è una rete composta di partecipanti non attendibili. Questa tecnologia presenta architetture software distribuite, dove i componenti trovano accordi per i loro stati condivisi senza fidarsi di un punto di intermedio o di eventuali partecipanti (terze parti). Blockchain è un connettore software, che contribuisce a rendere importanti le considerazioni architetturali sulle prestazioni e gli attributi di qualità, ad esempio: la sicurezza, la privacy, la scalabilità e la sostenibilità, del sistema.

L'obiettivo di questa tesi è l'analisi di Blockchain, per dimostrare come questa tecnologia non sia scalabile. La suddetta analisi consiste nella simulazione di una blockchain implementata in linguaggio Python, confrontando diversi protocolli di consenso che negli hanni sono stati ideati per garantirne il corretto funzionamento. Blockchain è una tecnologia che permette la creazione e la gestione di un database distribuito decentralizzato, che si basa sull'utilizzo di funzioni crittografiche per garantirne la sicurezza. Dalla sua creazione, avvenuta per essere utilizzata come base del sistema di crypto-valuta Bitcoin, Blockchain ha acquistato sempre più rilevanza, proponendosi come valida alternativa ai database tradizionali.

У сучасному світі проходить масова електронізація та автоматизація більшості сфер народного господарства, інформаційні технології впроваджуються у найрізноманітніші процеси в управлінні, виробництві, економіці та комерції. Оцифрування ключових сфер діяльності людини вимагає надійних технологій захисту, обробки та зберігання інформації, такі можливості надає технологія blockchain.

Quando si parla di trasformazione digitale ed innovazione tecnologica, Blockchain è una delle parole più usate degli ultimi anni. Questa tesi si pone l'obbiettivo di analizzare in modo ampio le dinamiche di sviluppo della tecnologia blockchain nei modelli di business delle imprese. Nel primo capitolo verrà trattato il tema dell'innovazione tecnologica; in particolare, si analizzerà come l'innovazione tecnologica funga da driver per l'innovazione strategica. Il capitolo seguente introdurrà il concetto d'innovazione strategica, di business model e come la nuova tecnologia blockchain possa interagire con esso. Il terzo capitolo sarà dedicato integralmente alla spiegazione della tecnologia blockchain, attraverso l'analisi PEST(politica, economica, sociale e tecnologica). Il capitolo finale cercherà d'intersecare i capitoli precedenti, dando una panoramica sulle potenzialità della tecnologia blockchain per la creazione di nuovi modelli di business.

This thesis paper explores the developing technology blockchain by trying to understand the technology from a technical performance standpoint and also understanding the development process of blockchain networks and applications. The first half of this paper analyzes two research papers, "Bitcoing-NG: A Scalable Blockchain Protocol" and "Untangling Blockchain: A Data Processing View of Blockchain Systems," to understand and explain some of the technical differences and shortcomings of blockchain technologies. The second half of this paper then proceeds to develop a private blockchain network on the Ethereum network and deploy a smart contract on that private blockchain network. This process gives insight into the development of blockchain applications and identifies the struggles blockchain developers face.

The problem of scalability of blockchain platforms has raised a considerable amount of attention in the recent months. With the rise of the use of blockchain platforms and the prices of various cryptocurrencies hitting an all-time high in December of 2017, blockchain has now entered the eyes of the general public. Often seen as the future of digital transactions and applications, the decentralized platform faces many struggles in building networks capable of supporting the vast number of financial transactions modern systems currently handle, let alone serving as a replacement for the client-server model of the Internet. This paper introduces the basic structure of blockchain platforms that exist today, introduces the scalability problem, and examines the solutions that developers have proposed or implemented.

Cela fait dix ans que la technologie blockchain a été créée. Cet amalgame de cryptographie et d'application peer to peer apporte de nombreuses innovations et services de sécurité au-delà des services financiers aux systèmes d'information ordinaires et offre de nouveaux cas d'utilisation pour les applications distribuées dans le contexte industriel. Pendant ce temps,l'IoT est devenu proéminent dans l'industrie comme la future révolution industrielle apportant de nouvelles applications mais ouvrant la voie à des vulnérabilités de sécurité. Au cours de cette thèse, nous avons exploré les principaux problèmes auxquels est confronté l'Internet des objets. Nous avons étudié comment les fournisseurs de plates-formes IIOT abordent ces défis en comparant les mesures qu'ils ont mises en oeuvre avec les recommandations de l'UIT en utilisant le processus analytique hiérarchique (AHP). Cette étude nous a permis d'identifier les domaines d'amélioration et les cas d'utilisation de la blockchain. La gestion des identités est un problème récurrent dans la littérature IIoT, nous proposons une approche de gestion des identités pour les systèmes distribués assistés par blockchain afin de garantir l'unicité des identités et l'intégrité de l'annuaire. Sur la base de ce travail, nous avons développé un système de distribution et de validation des mises à jour de micrologiciel sécurisé par blockchain et l'algorithme de machine learning Locality sensitive hashing (LSH)<br>It's been ten years since blockchain technology was created. This amalgam of cryptography and peer-to-peer application brings many innovations and securities services beyond financial services to regular information systems and offers new use cases for distributed applications in industrial context. Meanwhile, IoT became prominent in the industry as the future industrial revolution, bringing new applications but paving the way for security vulnerabilities. During this thesis, we explored the main issues facing the Internet of Things. We studied how IIoT platform providers address these challenges by comparing the measures they have implemented with the ITU recommendations using the Analytic Hierarchical Process (AHP). This study allowed us to identify areas of improvement and use cases for the blockchain. Identity management is a recurring problem in the IIoT literature, and we propose an identity management approach for distributed systems assisted by blockchain to guarantee the uniqueness of identities and the integrity of the directory. From this work, we have developed a blockchain-secured firmware update distribution and validation system using the machine learning algorithm Locality Sensitive Hashing (LSH)