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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
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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
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El Coudi El Amrani, Nafie (author)Reentrancy attacks target smart contracts of Decentralized Finance systems that contain coding errors caused by developers. This type of attacks caused, in the past 5 years, the loss of over 400 million USD. Several countermeasures were developed that use patterns to detect reentrancy attacks on smart contracts before deployment on the Ethereum...bachelor thesis 2021
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Duveen, Sem (author)Large volumes of medical data (MD) are continuously generated by the healthcare domain. When sharing these data, issues arise regarding privacy and security. To solve these issues, a permissioned blockchain (BC) can be used, but since blockchains do not have access control (AC) as a default feature, the integration of an access control system ...bachelor thesis 2021
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Stepanov, Paul (author)The following paper aims to investigate what and how are the main privacy-preserving methods applied in the blockchain-based supply chain industry scenario, with a primary focus on the food sector. Recent developments, such as the exordium of cryptocurrencies to increment efficiency, are withal addressed. Overviews of key use cases in industry...bachelor thesis 2021
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Tallyn, Ella (author), Revans, Joe (author), Morgan, E. (author), Fisken, Keith (author), Murray-Rust, D.S. (author)Smart contract systems could change the nature of last-mile deliv- ery for the better through enhanced precision, coordination and accountability. However, technological complexity poses a chal- lenge for end-users participating in the design process, making it hard to explore their experiences and incorporate their perspectives. We describe...conference paper 2021
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Rikken, O.K. (author), Janssen, M.F.W.H.A. (author), Roosenboom-Kwee, Z. (author), Büttgen, Marion (author), Dicenta, Julia (author), Spohrer, Kai (author), Venkatesh, Viswanath (author), Raman, Rajalakshmi (author), Hoehle, Hartmut (author), De Keyser, Arne (author)As blockchain technology is maturing to be confidently used in practice, its applications are becoming evident and, correspondingly, more blockchain research is being published, also extending to more domains than before. To date, scientific research in the field has predominantly focused on subject areas such as finance, computer science, and...journal article 2021
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Tjiam, Kevin (author), Wang, R. (author), Chen, H. (author), Liang, K. (author)Smart contracts on Ethereum enable billions of dollars to be transacted in a decentralized, 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...conference paper 2021
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Ersoy, O. (author), Genç, Ziya Alper (author), Erkin, Z. (author), Conti, M. (author)Smart contracts can be used for the fair exchange of digital goods. A smart contract can escrow the exchange where the receiver deposits the payment, and the sender claims it by providing the goods. In the case of misbehavior, the parties provide proof on whether the received goods match the pre-agreed description or not. In general, the...conference paper 2021
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Amiri Ara, Rashid (author), Paardenkooper, Klara (author), van Duin, Ron (author)Purpose: This paper aims to propose a new blockchain system design to improve engineering, procurement and construction (EPC) companies’ supply chain for constructing oil and gas infrastructure, by mitigating cost and time inefficiencies. Design/methodology/approach: A case study analyses the supply chain of a sample EPC company. First, a...journal article 2021
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Gong, Y. (author), van Engelenburg, S.H. (author), Janssen, M.F.W.H.A. (author)Companies increasingly tender knowledge-intensive tasks using crowdsourcing platforms to gain access to scarce knowledge and skills otherwise out of reach, and in this way, gaining competitive advantage. Despite its potential, existing crowdsourcing platforms encounter several challenges, including (1) fragmentation of expertise, as there are...journal article 2021
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López Cañizares, Janko (author)Recently, there is a growing need to address the investment gap in renewable energy by attracting non-institutional investors that have investment preferences better suited for the energy transition. Crowdfinancing is a promising alternative, as it allows for increased innovation, more sustainable development and reduced community risks and is...master thesis 2020
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Rikken, O.K. (author), Janssen, M.F.W.H.A. (author), Roosenboom-Kwee, Z. (author)The rise of blockchain has resulted in discussions on (new) governance models with multiple actors collaborating. Incidents and problems occurred due to flaws in blockchain protocols, smart contracts and Decentralized Autonomous Organizations (DAOs). Often it is unclear how decisions are made concerning evolvement of blockchain applications. In...journal article 2019
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Hartel, P.H. (author), Homoliak, I. (author), Reijsbergen, Daniël (author)Since it takes time and effort to put a new product or service on the market, one would like to predict whether it will be a success. In general this is not possible, but it is possible to follow best practices in order to maximize the chance of success. A smart contract is intended to encode business logic and is therefore at the heart of...journal article 2019
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Christiaanse, R.M.J. (author)MAAS as a mobility model leans on the idea that a gap between private and public transport systems needs to be bridged as well as on a city, intercity, national and supranational level. The current situation is felt problematic due to the fragmented tools and services often organized in silos to meet a traveler needs to undertake a trip. One...conference paper 2019
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Baharmand, Hossein (author), Comes, M. (author)As humanitarian organizations are struggling to reach an increasing number of beneficiaries, humanitarian-business partnerships, such as the use of logistics service providers (LSPs), promise to improve effectivity and efficiency of humanitarian assistance. Blockchain-based smart contracts which ensure automation, transparency, and efficiency...conference paper 2019
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Grover, Purva (author), Kar, Arpan Kumar (author), Janssen, M.F.W.H.A. (author), Ilavarasan, P. Vigneswara (author)Although blockchain has attracted a great deal of attention from academia and industry there is a lack of studies on acceptance drivers. This study explores blockchain acceptance by mining the collective intelligence of users on Twitter. It maps blockchain user acceptance drivers to technology acceptance constructs. The analysis shows that...journal article 2019
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Segers, Lennard (author), Ubacht, J. (author), Rukanova, B.D. (author), Tan, Y. (author)For determining the correctness of an import declaration lodged by a declarant within international shipping, customs authorities rely on manual cross-validation of the declaration with other trade documents. However, the sheer volume of import declarations lodged annually makes it impossible to manually cross-validate each declaration. Smart...conference paper 2019
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Ribbens, Frank (author)The competiveness between businesses is continuously increasing and multi-sided platforms seek to reduce cost, increase efficiency and improve the quality of products and services. This research explored the role of blockchain technology as a driver for business model innovation of multi-sided platforms. This case study contributed to scientific...master thesis 2018
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van der Laan, Bjorn (author)Smart contracts are applications that are deployed and executed on a blockchain's decentralised infrastructure. Many smart contract applications rely on data that resides outside the blockchain. However, while traditional web applications can communicate with trustworthy data sources directly through the Internet, this is not possible for smart...master thesis 2018