Blockchain Papers

Hamza Salem, Manuel Mazzara, Hadi Saleh, Rami Husami · 5 authors

No abstract is available for this record.

Tennakoon, Deepal, Gramoli, Vincent

By supporting decentralized applications (DApps), modern blockchains have become the technology of choice for the Web3, a decentralized way for people to interact with each other. As the popularity of DApps is growing, the challenge is now to allocate shard or subnetwork resources to face the associated demand of individual DApps. Unfortunately, most sharding proposals are inherently static as they cannot be adjusted at runtime. Given that blockchains are expected to run for years without interruption, these proposals are insufficient to cope with the upcoming demand. In this paper, we present dynamic blockchain sharding, a new way to create and close shards on-demand, and adjust their size at runtime without requiring to hard fork (i.e., creating duplicated instances of the same blockchain). The novel idea is to reconfigure sharding through dedicated smart contract invocations: not only does it strengthen the security of the sharding reconfiguration, it also makes it inherently transparent as any other blockchain data. Similarly to classic sharding, our protocol relies on randomness to cope with shard-takeover attacks and on rotating nodes to cope with the bribery of a slowly-adaptive adversary. By contrast, however, our protocol is ideally suited for open networks as it does not require fully synchronous communications. To demonstrate its efficiency, we deploy it in 10 countries over 5 continents and demonstrate that its performance increases quasi-linearly with the number of shards as it reaches close to 14,000 TPS on only 8 shards.

Omar Sefraoui, Afaf Bouzidi, Kamal Ghoumid, El Miloud Ar-Reyouchi

Nowadays, connected devices are growing exponen-tially; their produced data traffic has increased unprecedent-edly. Information systems security and cybersecurity are critical because data typically contain sensitive personal information, requiring high data protection. An authentication system manages and controls access to this data allowing the system to ensure the legitimacy of the access request. Most of the current identification and authentication systems are based on a centralized architec-ture. However, some concepts as Cloud computing and Blockchain use respectively distributed and decentralized architectures. Users without a central server will own platforms and applications of the next generation of Internet and Web3. This paper proposes AuSDiDe, a new authentication system for the distributed and decentralized structure. This solution aims to divide and share keys toward different and distributed nodes. The main objective of AuSDiDe is to securely store and manage passwords, private keys, and authentication based on the Shamir secret sharing algo-rithm. This new proposal significantly reinforces data protection in information security.

Kuzi Charamba

No abstract is available for this record.

Kshitij Dhyani, Jahnavi Mishra, Subhra Paladhi, I. Sumaiya Thaseen

No abstract is available for this record.

Alexis Direr, René Doursat, Benoït Laurent, Dan Biton

No abstract is available for this record.

Authors unavailable

Blockchain teknolojisinin yaygnlamas, zellikle web3 ve metaverse gibi gelimeler, blockchain andaki kayt niteliindeki kripto varlklarn hukuki adan incelenmesi ihtiyacn da beraberinde getirmektedir. Gerekten de her gn farkl blockchain a zerinde kripto varlklar zerinde birok ilem gerekletirilmekte, ilem hacmi de artmaktadr. Bu almada sz konusu varlklarn hukuki nitelii incelenmeye allmtr

Mohammad Mustafa Ibrahimy, Alex Norta, Peeter Normak

No abstract is available for this record.

Nicholas Paul Imperius, Ayman Alahmar

In the last few years, the technological future becoming apparent by the introduction of smart contracts into mainstream technology, specifically in the development of Web3 and the metaverse. Smart contracts will play a vital role in the decentralization and autonomy of the day-to-day tasks that must be completed. Several literature reviews, considered secondary sources, highlight the current state of testing methods for smart contracts made for Blockchain applications. In this paper, we present the results from a systematic mapping study to give structure to the information found from primary sources. Systematic mapping is a well-known method to identify and categorize research papers in a field with an increasing amount of literature. For this systematic mapping, we searched for studies between 2017 and present-day (March 2022) and were able to find 303 results, from which 47 were selected, by specific inclusion and exclusion criteria, to be relevant to this study. A concept map was created from the information gathered from primary sources to the attributes such as research type, contribution type, blockchain network, smart contract language, development process, testing methods, and testing environment. We also categorized the trends and demographics found in the selected papers based on publication year, author’s country, and more. The results of this systematic mapping showed that this field is very new and quickly increasing with new research. The researchers that are interested in this field could use the results found to create opportunities for their future work.

Davi Pedro Bauer

Nethereum is an open source .NET integration library for Ethereum that simplifies smart contract maintenance and interaction with public and private Ethereum nodes. This framework exposes a Web3 class where it is possible to interact with methods of wallets or smart contracts. In the example that you will see in this chapter, you will use the GetBalance method of a wallet to find out its balance.

Authors unavailable

No abstract is available for this record.

Apurba Pokharel, Krishna Dahal

No abstract is available for this record.

Brian Sanya Mondoh, Sara M. Johnson, Matthew Green, Aris Georgopoulos

No abstract is available for this record.

Liang Cai, Qilei Li, Xiubo Liang

No abstract is available for this record.

Om P. Sharma

Financial literacy among Generation Z is alarmingly low, especially around compound interest and credit. This paper presents an innovative, Web3-based gamified learning system that uses low-cost 3-D avatars and visual narratives to teach compounding concepts. By integrating NFTs for identity, interactive missions, and real-time compounding simulation within a metaverse environment, the platform aims to engage 18–24-year-olds intuitively and enhance knowledge retention. A prototype was implemented and evaluated with a randomized controlled trial (N = 100) comparing it to traditional text-based instruction. The Web3 gamified group outperformed the control group significantly (75 % vs 55 %, p < 0.01), with higher engagement scores and intent to apply concepts. Qualitative feedback highlighted the motivational effect of avatar growth and NFT rewards. Results show that Web3 gamification can meaningfully improve compound interest learning while remaining low-cost and scalable. Limitations include gas-cost friction and novelty bias. Future work includes deploying advanced financial topics, refining UX to mitigate over-gamification, and evaluating long-term retention and cross-cultural adoption.

Ahto Buldas, Dirk Draheim, Mike Gault, Risto Laanoja · 11 authors

<p>Since its introduction with Bitcoin in 2009, blockchain technology has received tremendous attention by academia, industry, politics and media alike, in particular, through extended blockchain-based visions such as smart contracts, decentralized finance, and, most recently, Web3. The critical prerequisite for any such blockchain-based vision to be turned into reality is uncapped scalability. Furthermore, and equally important, blockchain technology needs to transcend the stage of specialized tokens into an adaptive, heterogeneous tokenization platform. In this paper, we explain the Alphabill family of technologies that addresses both unlimited scalability and unrestricted adaptivity. We deliver a sharded blockchain technology with unlimited scalability and performance, called KSI Cash, which is based on a new form of electronic money scheme, the bill scheme. We present performance tests of KSI Cash that we have conducted with the European Central Bank and a group of eight national central banks from the Eurosystem in order to assess the technological feasibility of a digital euro, showing the system operating with 100 million wallets and 15 thousand transactions per second (under simulation of realistic usage), having an estimated carbon footprint of 0.0001g CO2 per transaction (Bitcoin = 100 kg and more); furthermore, showing the system operating with up to 2 million payment orders per second, an equivalent of more than 300.000 transactions per second (in a laboratory setting with the central components of KSI Cash), scaling linearly in terms of the number of deployed shards. We explain, in detail, the key concepts that unlock this performance (i.e., the concepts of the bill money scheme). The results provide evidence that the scalability of our technology is unlimited in both permissioned and permissionless scenarios, resulting into the Alphabill Money technology. Next, we contribute the architecture of a universal tokenization platform that allows for universal asset tokenization, transfer and exchange as a global medium of exchange, called Alphabill platform. We reveal the crucial conceptual and technical contributions of the platform's architecture and their interplay, including the data structures of KSI Cash and Alphabill Money, the dust collection solution of Alphabill Money, and the atomic swap solution of the Alphabill platform.</p>

Tim Corballis, Max Soar

Digital organizations form part of the new wave of blockchain technologies, following Bitcoin and related cryptocurrencies. “Utopia of Abstraction” offers an analysis of the utopian promise of digital organizations through a reading of one such project, Colony. We provide a critique of the ideology of Colony's white paper, supplemented by readings of pages from its website, as a member of a genre of texts that promote their products through seemingly neutral, technical descriptions. Colony's texts suggest an abstract, contextless and scaleless organizational solution—powered by smart contracts on a blockchain—that, according to its proponents, might be applied to any social situation, from small firm to state-level governance. For its users, this organization combines a promise of sovereignty removed from that of the state, as well as implied financial returns. Our reading of Colony echoes the critiques of scholars arguing that cyberlibertarianism is a dominant politic of blockchain technologies. Furthermore, drawing on critiques of code as law and the elision of the social in smart contracts, we argue that Colony's vision presents a model of technical organization that substitutes for the state in the context of waning popular sovereignty. We ultimately suggest an understanding of digital organizations reminiscent of the settler colonial situation: the assumption of an empty social space to be filled, and the promise of sovereignty and riches for those occupying it. Analysis of these logics is relevant as hype increases around non-fungible tokens, Web3, and the corporate metaverse as well as data practices more widely.

Darcy W E Allen, Chris Berg, Sinclair Davidson

No abstract is available for this record.

ギョウシュウ ソク, レイ ゴトウ, Xiaozhou Shu, Rei Gotō · 6 authors

修士学位論文. 2022年度経営学 第3989号

Andrii Kopp

No abstract is available for this record.

Michael Davar, Ioana Bratu

No abstract is available for this record.

Aditya Asgaonkar

No abstract is available for this record.

Marco Bodellini, Kai Zhang, Jin Enyi

Abstract This chapter covers the innovative concept of decentralized autonomous organization (DAO). DAO refers to a system or arrangement for distributed decision-making which typically relies on or is underpinned by a computer program or a compilation of computer programs. The DAO essentially consists of computer codes that exist virtually on the relevant blockchain or other distributed ledger which codes are typically open sourced. The chapter then provides an overview of the potential legal and regulatory implications for the DAO and other DAOs within the context of UK and EU investment fund regulation. It highlights the considerable uncertainty regarding how the DAO should be treated from a legal and regulatory perspective.

Tom Taulli

In the summer of 2017, Nikil Viswanathan and Joe Lau cofounded Alchemy. The business was actually in their San Francisco apartment.