Searched for: subject:"blockchain"
(1 - 20 of 144)

Pages

document
Paulsen, Cathrine (author)
Hyperledger Fabric is a permissioned enterprise blockchain allowing organizations to collaborate and automate processes via smart contracts. However, these contracts could contain security vulnerabilities leading to unexpected behavior or other negative consequences. Therefore, this study takes a closer look at three reported smart contract...
bachelor thesis 2021
document
Stefanov, Rado (author)
Blockchain networks have gained recent popularity among organisations that want to make use of the security aspects that blockchain provides. Fabric is one of the most used distributed network technologies, most commonly applied in scenarios that require confidential data to be stored securely and privately. Use case examples are finance,...
bachelor thesis 2021
document
Tjiam, Kevin (author)
Smart contracts on Ethereum enable billions of dollars of value to be transacted in a decentralised, transparent and trustless environment. However, adversaries lie await in the Dark Forest, waiting to exploit any and all smart contract vulnerabilities in order to extract profits from unsuspecting victims in this new financial system. As the...
bachelor thesis 2021
document
Slager, Cheyenne (author)
GoQuorum is an enterprise blockchain platform that supports smart contracts and allows for private transactions. Smart contracts enable automated payment while eliminating the need for third-party involvement. Previous attacks on smart contracts have already shown that existing vulnerabilities can lead to great financial losses. Yet, a study...
bachelor thesis 2021
document
Op den Orth, Sara (author)
Within the context of the Ethereum blockchain protocol, reentrancy is a well-known and well-researched smart contract vulnerability. However, when considering GoQuorum, an Ethereum soft fork, barely any research discussing smart contract vulnerabilities exists. This report aims to partly fill this research gap by evaluating the reentrancy smart...
bachelor thesis 2021
document
Jacobs, Ben (author)
The health industry is a data-intensive domain. Sharing medical data between medical facilities is necessary for providing good healthcare as well as for research in the healthcare domain. However, due to the sensitive and personal nature of health data, challenges arise when sharing this data. Consent management is a key aspect. The use of...
bachelor thesis 2021
document
Neut, Oliver (author)
Blockchains like Bitcoin are known to be victim of scalability issues. The lack in high throughput and low latency form a great bottleneck to its network. A promis- ing solution are layer 2 protocols, more precisely payment channel networks (PCN). Payment success rates are a common metric in these networks. These rates can be in- creased by...
bachelor thesis 2021
document
Yüksel, Akif (author)
Kyber is a Decentralized Finance (DeFi) system which runs on the Ethereum blockchain. DeFi aims to remove centralized intermediaries such as Market Makers. An Automated Market Maker (AMM), implemented in a smart contract, is a decentralized version of these. Kyber's Dynamic Market Maker (DMM) is a next-generation AMM which solves two issues:...
bachelor thesis 2021
document
Kazemi Koohbanani, Paolo Arash (author)
The Bitcoin Lightning Network is a layer-two solution that promises instant payments, scalability, and low transaction fees on top of the Bitcoin blockchain. In case there is no direct channel between the sender and receiver, the routing algorithm uses source routing and a shortest path algorithm to determine the hops in a transaction. However,...
bachelor thesis 2021
document
Kroon, Harmen (author)
Decentralized Finance (DeFi) is build on smart-contract supporting blockchains, with Ethereum being the largest ecosystem. A collection of smart-contracts aims to serve as decentralized implementations of financial systems. The philosophy of DeFi dictates automation and desintermediation through exploiting nascent distributed ledger technology...
bachelor thesis 2021
document
Heijbroek, Diederik (author)
Patient monitoring and clinical trial management generate continuous large volumes of healthcare data, causing the healthcare industry to be a data-intensive domain. Existing data storage techniques and access mechanics in the healthcare domain exhibit several challenges related to data security, patient privacy, and interoperability. Blockchain...
bachelor thesis 2021
document
Filip, Eduard (author)
Federated Learning starts to give a new perspective regarding the applicability of machine learning in real-life scenarios. Its main goal is to train the model while keeping the participants' data in their devices, thus guaranteeing the privacy of their data. One of the main architectures is the Horizontal Federated Learning, which is the most...
bachelor thesis 2021
document
de Klerk, Leon (author)
The domain name system (DNS) and public key infrastructure (PKI) provide the core services for the Internet. The use of these systems requires trust in institutions to provide proper services, which they can fail to provide. Centralized management allows these institutions to perform censorship. Additionally, these legacy systems have seen...
bachelor thesis 2021
document
Dikmen, Cemal (author)
With the growing scale of the IoT, many industries enjoy the benefit of automation. The IoT consists of an interconnected network of devices that sense their surroundings and share data among other IoT devices. However, this data can be sensitive and private in nature, making security within the ever-growing IoT network a high priority. Because...
bachelor thesis 2021
document
Beekhuizen, Michael (author)
IoT devices have grown rapidly over the past few years. IoT devices are mostly connected to a central server that stores the data and handles end-to-end communication. Due to the increase of IoT devices, the latency with the server increases. Furthermore, when using a central server the data is at risk of being deleted or tampered with. To...
bachelor thesis 2021
document
Darbari, Shubhankar (author)
The expansion of the Internet and wireless access has led to a widespread increase of Internet of Things applications. These smart devices are becoming a daily aspect of our lives. All the convenient and automated services provided by smart devices come from a centralized service provider. This service provider has access to all the personal...
bachelor thesis 2021
document
GAL, Jean (author)
Blockchain is an expanding technologythat offers benefits when applied to supplychain management. This distributed ledgertechnology is combined with supply chainsfor its intrinsic characteristics. For instance,traceability, immutability, and more arediscussed. In this paper, we first presentprivacy-related challenges encountered whenapplying...
bachelor thesis 2021
document
Duijsens, Remy (author)
Digital identity management has been established in a mainly centralized manner. In response to a lack of control in current identity management systems, the concept of Self-Sovereign Identity (SSI) was defined to enable decentralization. Recently, this concept gained traction, and several implementations have been proposed. The decentralized...
bachelor thesis 2021
document
Guettache, Karim (author)
The sharing of medical data is becoming ever more important. More and more health-related data is being generated everyday and as will be shown later, its primary as well as its secondary usage brings many benefits to the healthcare system. However, medical data systems are not fail proof and are often the target of cyber-attacks, compromising...
bachelor thesis 2021
document
Zagorac, Ivor (author)
The continuous generation of a large volume of health data from different sources has led to healthcare being a data-intensive domain. To achieve innovative advances in medical treatment procedures and to provide personalized healthcare services to the patients this data needs to be shared among different medical facilities. However, because...
bachelor thesis 2021
Searched for: subject:"blockchain"
(1 - 20 of 144)

Pages