1 Claim No. IL-2021-00019 in the HIGH COURT of JUSTICE
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Prism: Scaling Bitcoin by 10000
Prism: Scaling Bitcoin by 10,000× Lei Yang∗ Vivek Bagaria† Gerui Wang‡ Mohammad Alizadeh∗ David Tse† Giulia Fanti§ Pramod Viswanath‡ ABSTRACT and throughput in the blockchain (§4). A recent theoretical paper Bitcoin is the first fully-decentralized permissionless blockchain described the core protocol and analyzed its security properties [6]. protocol to achieve a high level of security: the ledger it maintains While these theoretical results are promising, it is not clear has guaranteed liveness and consistency properties as long as the ad- how well they can translate into real-world performance. First, the versary has less compute power than the honest nodes. However, its Prism consensus protocol is much more complex than the longest throughput is only 7 transactions per second and the confirmation chain protocol: clients must maintain over 1000 distinct blockchains, latency can be up to hours. Prism is a new blockchain protocol that is which refer to each other to create an intricate directed acyclic graph designed to achieve a natural scaling of Bitcoin’s performance while (DAG) structure, and they must process blocks at very high rates maintaining its full security guarantees. We present an implementa- (e.g., 100-1000s of blocks per second at 100s of Mbps) to update these tion of Prism that achieves a throughput of over 70;000 transactions blockchains and confirm transactions. Second, Prism’s theoretical per second and confirmation latency of tens of seconds on networks analysis relies on several simplifying assumptions (e.g., round-based of up to 1000 EC2 Virtual Machines. The code can be found at [5]. -
Executive Summary Background Information What Is Bitcoin? What Is
Executive Summary Details surrounding the identity of Satoshi Nakamoto and the origins of Bitcoin have emerged from a Florida court case, Kleiman v Wright. The plaintiff, Ira Kleiman, is suing the defendant, Craig Steven Wright (CSW) for the rights to Bitcoin tokens and Bitcoin related intellectual property. Ira alleges that his deceased brother Dave Kleiman was CSW’s partner in the development of Bitcoin and Bitcoin related IP. Implicit in this allegation is that CSW created Bitcoin and has access to Satoshi’s Bitcoins currently valued ~$10B. CSW has made it clear that his intention is to sell his BTC in favor of his preferred version of Bitcoin, BSV, which is more aligned with the original design. If this occurs it will have massive market ramifications on the order of hundreds of billions of dollars. Court case details support CSW’s claim to be Satoshi. This contrasts the opinion of many industry leaders who don’t believe that CSW is Satoshi or that he can follow through on his threat to sell BTC for BSV. The conflict around the Satoshi identity ties into a larger conflict about the purpose of Bitcoin and the role of law in Bitcoin. Background Information What is Bitcoin? What is BTC? Bitcoin is a revolutionary peer-to-peer network and electronic cash system. Over its 10 year history, Bitcoin tokens have appreciated from being effectively worthless to having a market cap of over $315 billion. BTC is the predominant ticker symbol of the Bitcoin token. Others, like BSV and BCH exist through a process called forking. -
Crypto Garage Developed and Executed the Contract of a P2P
April 19, 2019 Crypto Garage, Inc. NEWS RELEASE Crypto Garage Developed and Executed the Contract of a P2P Protocol Based Crypto Asset Derivative Settled in Bitcoin 〜Executed First Derivative Contract with Blockstream〜 Crypto Garage, Inc. (HQ: Tokyo; Representative Director: Masahito Okuma; Crypto Garage), a Fintech company developing blockchain financial services and also a subsidiary of Digital Garage, Inc. (TSE first section: 4819; HQ: Tokyo; Representative Director, President Executive Officer and Group CEO: Kaoru Hayashi; DG) developed a peer-to- peer crypto asset derivative contract protocol and executed a contract based on this protocol on the Bitcoin Blockchain. Blockstream Corporation (HQ: Victoria Canada; CEO: Adam Back; Blockstream), the global leader in blockchain technology and financial cryptography, and Crypto Garage entered into a derivative contract that locks the future Bitcoin price [on a collared basis] in order to hedge the Bitcoin price fluctuation risk against the US dollar. Crypto Garage developed a P2P derivative technology based on the Discreet Log Contracts (https://dci.mit.edu/smart-contracts) that Thaddeus Dryja from MIT Digital Currency Initiatives proposed. This contract is a smart contract applied on the Bitcoin Blockchain and requires the agreement and posting of collateral by both parties. The agreed terms and collateral are defined on the Bitcoin Blockchain. Since settlement is cryptographically secured, this contract minimizes counterparty risk, such as breach of contract and other contract termination events. Contact: Hiroshi Ikemoto, Leo Shiraishi, Corporate Communication Dept., Digital Garage, Inc. Email: [email protected], TEL: +81-3-6367-1101 April 19, 2019 Crypto Garage, Inc. NEWS RELEASE The bitcoin price for the maturity date is determined by the ICE Cryptocurrency Data Feed, as agreed upon by both parties in advance. -
Bitcoin Scaling Solutions and Their Downsides by Simona Mola and Zhong Zhang (March 6, 2019, 12:35 PM EST)
Portfolio Media. Inc. | 111 West 19th Street, 5th Floor | New York, NY 10011 | www.law360.com Phone: +1 646 783 7100 | Fax: +1 646 783 7161 | [email protected] Bitcoin Scaling Solutions And Their Downsides By Simona Mola and Zhong Zhang (March 6, 2019, 12:35 PM EST) Bitcoin was designed as a decentralized monetary system and an alternative to central banking. Decentralization implies that no one can unilaterally change the way bitcoin works or its transaction history. Since Satoshi Nakamoto released the original bitcoin whitepaper in 2010,[1] reaching and maintaining decentralization has been the priority of all technological developments. To this end, bitcoin relies on its technological design: open source software, public-key cryptography, blockchain data structure, proof-of- work mining and distributed full nodes. Simona Mola However, it is well known that bitcoin has a scalability problem.[2] We have all heard at least once the comparison between bitcoin and Visa in terms of transaction capacity. That is, while Visa handles an average of 150 million transactions per day as of the end of 2018,[3] bitcoin network processes about 280,000 transactions per day.[4] This capacity is not enough to serve as a global digital medium of exchange. Bitcoin Average Transaction Fee in USD Zhong Zhang Besides the comparison with Visa, which may not be quite parallel, bitcoin’s scaling problem is reflected in its average transaction fees. In the situation of greater market demand for bitcoin transactions, the restriction of the block size to 1 MB leads to a higher average wait time before confirmation and thus greater transaction fees. -
Blockchain and Cryptocurrencies Technologies and Network Structures: Applications, Implications and Beyond Lisa Morhaim
Blockchain and cryptocurrencies technologies and network structures: applications, implications and beyond Lisa Morhaim To cite this version: Lisa Morhaim. Blockchain and cryptocurrencies technologies and network structures: applications, implications and beyond. 2019. hal-02280279 HAL Id: hal-02280279 https://hal.archives-ouvertes.fr/hal-02280279 Preprint submitted on 6 Sep 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Blockchain and cryptocurrencies technologies and network structures: applications, implications and beyond Lisa Morhaim∗ Wednesday 4th September, 2019 Abstract Blockchain technology is bringing together concepts and operations from several fields, including computing, communications networks, cryptography, and has broad implications and consequences thus encompassing a wide variety of domains and issues, including Network Science, computer science, economics, law, geography, etc. The aim of the paper is to provide a synthetic sketch of issues raised by the development of Blockchains and Cryptocurrencies, these issues are mainly presented through the link between on one hand the techno- logical aspects, i.e. involved technologies and networks structures, and on the other hand the issues raised from applications to implications. We believe the link is a two-sided one. The goal is that it may contribute facilitating bridges between research areas. -
Blockchain, a Catalyst for New Approaches in Insurance
Blockchain, a catalyst for new approaches in insurance Thought up as the underlying architecture for the Bitcoin cryptocurrency in 2008, blockchain technology is currently a hot topic and the subject of numerous studies in sectors outside the payments industry to which it has often been confined in the past. Blockchain is considered by some to represent the next technological revolution after the Internet. In fact, the idea of a decentralised, secure and transparent ledger distributed among users can be relevant to many different fields. The insurance industry, with its highly complex processes, could be a major beneficiary of the technology. By removing intermediaries in a new type of arrangement, blockchain technology could completely upend the insurance value chain: - Development/acceleration of new products/markets for which business models were difficult to define until now. - New approaches to underwriting, contracts and claims management, particularly through a combination of smart contracts and the Internet of Things (IoT). - Overhaul of the modus operandi of insurance agreements. - New reinsurance approaches, particularly internal reinsurance via smart contracts. - Transformation of asset management with automated settlement and delivery of intangibles. Use of blockchain should help to cut acquisition, management, documentation and compliance costs. It should help new players enter the market and new markets to emerge, particularly in developing countries. By simplifying use and increasing transparency, it will also help to improve customer satisfaction. Although the upside is significant, several risks should also be anticipated. These include competition with InsurTechs, a legal framework that will need to evolve, and the challenges of rolling out the technology on a large scale. -
KT 2-5-2016 Layout 1
SUBSCRIPTION TUESDAY, MAY 3, 2016 RAJAB 26, 1437 AH www.kuwaittimes.net Expat oil Emotional return Egypt killings Leicester workers strike as first US cruise deepen mystery striker Vardy over unpaid in decades over death of gets top salaries4 reaches Cuba7 Italian14 student award20 Freedoms make austerity Min 21º Max 41º campaign tricky for govt High Tide 07:55 & 19:44 Low Tide Parliament, public staunchly against welfare cuts 00:52 & 13:46 40 PAGES NO: 16863 150 FILS KUWAIT: A three-day strike by oil workers in Kuwait last month over pay reforms shows the government faces con- Champions Leicester turn tables on elite siderable opposition as it prepares to push through painful and controversial cuts to longstanding welfare LONDON: Leicester City’s against-the-odds Premier benefits. Oil-exporting states around the Gulf are reducing League title success is a story of belief, dogged graft and subsidies for fuel, public utilities and food, and freezing or inspirational leadership prevailing against the money- slowing the growth of public sector wages, as they try to inflated complacency of England’s leading clubs. curb big budget deficits caused by low oil prices. Exploiting the frailties of the presumed title favorites, Saudi Arabia, the United Arab Emirates, Qatar, Oman the 5,000-1 outsiders surged to the summit and then and Bahrain have all taken such steps in the past six held their nerve over four long, giddy months to com- months. But Kuwait has been slower to act; reforms were plete one of the most improbable upsets in sporting his- still being discussed in parliament last week and no tory. -
Facilitating Cross-Chain Cryptocurrency Exchanges: an Inquiry Into Blockchain Technology and Interoperability with an Emphasis on Cryptocurrency Arbitrage
Eastern Michigan University DigitalCommons@EMU Senior Honors Theses & Projects Honors College 2020 Facilitating cross-chain cryptocurrency exchanges: An inquiry into blockchain technology and interoperability with an emphasis on cryptocurrency arbitrage Samuel Grone Follow this and additional works at: https://commons.emich.edu/honors Part of the Computer Sciences Commons Facilitating cross-chain cryptocurrency exchanges: An inquiry into blockchain technology and interoperability with an emphasis on cryptocurrency arbitrage Abstract Since the introduction and proliferation of the blockchain-based cryptocurrency Bitcoin, alternative cryptocurrencies also based on blockchain technology have exploded in number. It was once believed that one, or very few, cryptocurrencies would eventually dominate the market and drive out competitors. This assumption, however, was incorrect. Thousands of cryptocurrencies exist concurrently. The vast number of cryptocurrencies leads to a problem—what if the cryptocurrency that an individual possesses does not meet their current needs as well as another cryptocurrency might? The attempt to solve this problem has led to the rise of many cryptocurrency exchanges and exchange schemes. In this paper, we will discuss the motivations for an individual to be interested in exchanging two or more cryptocurrencies by describing and comparing various popular cryptocurrencies with different desirable attributes. While we will discuss these attributes, this paper will give special focus to arbitrage in particular. In addition, we will describe various cryptocurrency exchange schemes and their advantages and disadvantages. Finally, we contribute to the understanding of cryptocurrency exchangeability and interoperability by comparing the historical price data of several cryptocurrencies to determine how often arbitrage has been possible in the past. Degree Type Open Access Senior Honors Thesis Department Computer Science First Advisor Weitian Tong Second Advisor S. -
Blockchain Pubbliche E Permissioned: Stato Dell'arte E Sviluppi Recenti
Dipartimento di Matematica e Informatica Università degli Studi di Cagliari BLOCKCHAIN PUBBLICHE E PERMISSIONED: STATO DELL'ARTE E SVILUPPI RECENTI Michele Marchesi [email protected] Blockchain permissioned, DEFI e loro applicazioni Online, 24 Febbraio 2021 La blockchain: breve storia 2008-2009: Bitcoin, una moneta digitale: – basata su Internet – pubblica: chiunque può parteciparvi – senza un'autorità centrale: funziona anche senza dare fiducia a tutti i partecipanti 2014-2015: Ethereum: – gli Smart Contract: programmi eseguiti sulla blockchain – la blockchain diviene un calcolatore universale 2015: Hyperledger: – la blockchain può essere usata anche privatamente – blockchain permissioned a invito – DLT: digital ledger technology www.agile-group.org 2 Le basi matematiche e informatiche Le basi matematiche (crittografiche) della tecnologia blockchain e DLT sono: la crittografia asimmetrica: il possesso della chiave privata dimostra la proprietà della chiave pubblica associata, e dell'address da questa ricavato le proprietà delle funzioni “hash”: l'impronta digitale (“hash”) di un documento è unica, e cambia completamente anche dopo minime modifiche Le basi informatiche sono: la rete Internet: senza Internet, la DLT non avrebbe senso! l'architettura peer-to-peer: i nodi (computer) governano la rete in modo decentralizzato il software open source: chiunque può scaricare e usare il software di nodo, e collegarsi a una blockchain pubblica, o con altri attivarne una permissioned www.agile-group.org 3 L'architettura informatica Una -
The Lightning Network - Deconstructed and Evaluated
The Lightning Network - Deconstructed and Evaluated Anti-Money Laundering (AML) and Anti-Terrorist Financing (ATF) professionals, especially those working in the blockchain and cryptocurrency environment, may have heard of the second layer evolution of Bitcoin's blockchain - the Lightning Network, (LN). This exciting new and rapidly deploying technology offers innovative solutions to solve issues around the speed of transaction times using bitcoin currently, but expandable to other tokens. Potentially however, this technology raises regulatory concerns as it arguably makes, (based on current technical limitations), bitcoin transactions truly anonymous and untraceable, as opposed to its current status, where every single bitcoin can be traced all the way back to its coinbase transaction1 on the public blockchain. This article will break down the Lightning Network - analyzing how it works and how it compares to Bitcoin’s current system, the need for the technology, its money laundering (ML) and terrorist financing (TF) risks, and some thoughts on potential regulatory applications. Refresher on Blockchain Before diving into the Lightning Network, a brief refresher on how the blockchain works - specifically the Bitcoin blockchain (referred to as just “Bitcoin” with a capital “B” herein) - is required. For readers with no knowledge or those wishing to learn more about Bitcoin, Mastering Bitcoin by Andreas Antonopoulos2 is a must read, and for those wishing to make their knowledge official, the Cryptocurrency Certification Consortium, (C4) offers the Certified Bitcoin Professional (CBP) designation.3 Put simply, the blockchain is a growing list of records that can be visualized as a series of blocks linked by chains. Each block contains specific information - in Bitcoin’s case, a list of transactions and their data, which includes the time, date, amount, and the counterparties4 of each transaction. -
Arxiv:2010.05589V3 [Cs.DS] 31 Oct 2020 Growth of Random Trees By
Growth of Random Trees by Leaf Attachment Nomvelo Karabo Sibisi University of Cape Town [email protected] October 2020 Abstract We study the growth of a time-ordered rooted tree by probabilistic attachment of new vertices to leaves. We construct a likelihood function of the leaves based on the connectivity of the tree. We take such connectivity to be induced by the merging of directed ordered paths from leaves to the root. Combining the likelihood with an assigned prior distribution leads to a posterior leaf distribution from which we sample attachment points for new vertices. We present computational examples of such Bayesian tree growth. Although the discussion is generic, the initial motivation for the paper is the concept of a distributed ledger, which may be regarded as a time-ordered random tree that grows by probabilistic leaf attachment. 1 Introduction In the context of this paper, a tree is an object in graph theory. In particular, we study a directed rooted tree (vertices joined by directed edges where one vertex is the root) that grows with time according to probabilistic rules. The motivation for such a study will be discussed below. In the first instance, we give a simple illustration of the growth of a directed rooted tree. arXiv:2010.05589v3 [cs.DS] 31 Oct 2020 We adopt an approach to graph theory where visual representation often takes precedence over formal description. Accordingly, Figure 1 shows a sequence of ‘snapshots’ of a tree as it grows through attachment of new vertices to existing vertices (time increases to the right in each snapshot and a directed edge from one vertex to another represents attachment of the former to the latter). -
Bitcoin and the Uniform Commercial Code Jeanne L
University of Miami Law School Institutional Repository University of Miami Business Law Review 6-1-2016 Bitcoin and the Uniform Commercial Code Jeanne L. Schroeder Follow this and additional works at: http://repository.law.miami.edu/umblr Part of the Banking and Finance Law Commons, and the Commercial Law Commons Recommended Citation Jeanne L. Schroeder, Bitcoin and the Uniform Commercial Code, 24 U. Miami Bus. L. Rev. 1 (2016) Available at: http://repository.law.miami.edu/umblr/vol24/iss3/3 This Article is brought to you for free and open access by Institutional Repository. It has been accepted for inclusion in University of Miami Business Law Review by an authorized administrator of Institutional Repository. For more information, please contact [email protected]. Bitcoin and the Uniform Commercial Code Jeanne L. Schroeder* Much of the discussion of bitcoin in the popular press has concentrated on its status as a currency. Putting aside a vocal minority of radical libertarians and anarchists, however, many bitcoin enthusiasts are concentrating on how its underlying technology – the blockchain – can be put to use for wide variety of uses. For example, economists at the Fed and other central banks have suggested that they should encourage the evolution of bitcoin’s blockchain protocol which might allow financial transactions to clear much efficiently than under our current systems. As such, it also holds out the possibility of becoming that holy grail of commerce – a payment system that would eliminate or minimize the roles of third party intermediaries. In addition, the NASDAQ and a number of issuers are experimenting with using the blockchain to record the issuing and trading of investments securities.