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Useful Computation on the Block Chain The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters Citation Yeung, Fuk. 2019. Useful Computation on the Block Chain. Master's thesis, Harvard Extension School. Citable link https://nrs.harvard.edu/URN-3:HUL.INSTREPOS:37364565 Terms of Use This article was downloaded from Harvard University’s DASH repository, and is made available under the terms and conditions applicable to Other Posted Material, as set forth at http:// nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of- use#LAA 111 Useful Computation on the Block Chain Fuk Yeung A Thesis in the Field of Information Technology for the Degree of Master of Liberal Arts in Extension Studies Harvard University November 2019 Copyright 2019 [Fuk Yeung] Abstract The recent growth of blockchain technology and its usage has increased the size of cryptocurrency networks. However, this increase has come at the cost of high energy consumption due to the processing power needed to maintain large cryptocurrency networks. In the largest networks, this processing power is attributed to wasted computations centered around solving a Proof of Work algorithm. There have been several attempts to address this problem and it is an area of continuing improvement. We will present a summary of proposed solutions as well as an in-depth look at a promising alternative algorithm known as Proof of Useful Work. This solution will redirect wasted computation towards useful work. We will show that this is a viable alternative to Proof of Work. Dedication Thank you to everyone who has supported me throughout the process of writing this piece. -
The Magnificent Seven
The Magnificent Seven A closer look at functional attributes of blockchain platforms The Magnificent Seven1 Following a whitepaper published in late 2008, the Bitcoin system came into being in 2009, and the underlying technology became what we refer to as Blockchain today. 1 The top seven cryptocurrencies covered a good variety of attributes that are essential to gain a more thorough understanding of the potentials offered by this new technology. The Magnificent Seven 1 Since then, a variety of different cryptocurrency platforms have been created, and based on data from CoinMarketCap (https://coinmarketcap.com/), as of 27 March 2021, there were 8,964 crypto tokens in existence, with a total Market Cap of over USD$1.6 Trillion. The top seven cryptocurrencies made up around 80% of the global market capitalisation: Market Cap Token Symbol (billion USD) % Bitcoin BTC 1,026.8 59.23 Ethereum ETH 0,196.2 11.32 Cardano ADA 0,040.2 02.32 Binance Coin BNB 0,039.1 02.25 Tether USDT 0,038.5 02.22 Polkadot DOT 0,030.4 01.75 XRP XRP 0,025.8 01.49 80.58 Rest of 8,957 tokens 19.42 Bitcoin alone represents nearly 60% of the total cryptocurrency value, with Ethereum being the second highest by value. However, these cryptocurrencies are not in fact the same: value aside, they differ in some interesting ways, which in turn affect their “function” and value proposition. Asset Smart Token Year Type Minable Consensus2 Limit Backed Contract BTC 2009 Native Yes POW No 21m ETH 2012 ERC-20 Yes / No3 POW | POS No Y none ADA 2017 Native No POS No Y 45bn BNB 2017 ERC-20 No Tendermint No 100m Multiple Forms: USDT-Omni, USDT 2014 USDT-TRON, No NA USD none USDT-ERC20 and USDT-EOS DOT 2017 Native NPOS No Y none Ripple XRP 2012 Native No Transaction No 100bn Protocol Source: https://icorating.com/ and https://coincodex.com/ 2 In simple terms, consensus mechanism is a means of authenticating and validating transactions on a Blockchain (or distributed ledger) without having to trust or rely on a central authority. -
On the Relationship of Cryptocurrency Price with US Stock and Gold Price Using Copula Models
mathematics Article On the Relationship of Cryptocurrency Price with US Stock and Gold Price Using Copula Models Jong-Min Kim 1 , Seong-Tae Kim 2 and Sangjin Kim 3,* 1 Statistics Discipline, University of Minnesota at Morris, Morris, MN 56267, USA; [email protected] 2 Department of Mathematics, North Carolina A&T State University, Greensboro, NC 27411, USA; [email protected] 3 Department of Management and Information Systems, Dong-A University, Busan 49236, Korea * Correspondence: [email protected] Received: 15 September 2020; Accepted: 20 October 2020; Published: 23 October 2020 Abstract: This paper examines the relationship of the leading financial assets, Bitcoin, Gold, and S&P 500 with GARCH-Dynamic Conditional Correlation (DCC), Nonlinear Asymmetric GARCH DCC (NA-DCC), Gaussian copula-based GARCH-DCC (GC-DCC), and Gaussian copula-based Nonlinear Asymmetric-DCC (GCNA-DCC). Under the high volatility financial situation such as the COVID-19 pandemic occurrence, there exist a computation difficulty to use the traditional DCC method to the selected cryptocurrencies. To solve this limitation, GC-DCC and GCNA-DCC are applied to investigate the time-varying relationship among Bitcoin, Gold, and S&P 500. In terms of log-likelihood, we show that GC-DCC and GCNA-DCC are better models than DCC and NA-DCC to show relationship of Bitcoin with Gold and S&P 500. We also consider the relationships among time-varying conditional correlation with Bitcoin volatility, and S&P 500 volatility by a Gaussian Copula Marginal Regression (GCMR) model. The empirical findings show that S&P 500 and Gold price are statistically significant to Bitcoin in terms of log-return and volatility. -
Pwc I 2Nd Global Crypto M&A and Fundraising Report
2nd Global Crypto M&A and Fundraising Report April 2020 2 PwC I 2nd Global Crypto M&A and Fundraising Report Dear Clients and Friends, We are proud to launch the 2nd edition of our Global Crypto M&A and Fundraising Report. We hope that the market colour and insights from this report will be useful data points. We will continue to publish this report twice a year to enable you to monitor the ongoing trends in the crypto ecosystem. PwC has put together a “one stop shop” offering, focused on crypto services across our various lines of services in over 25 jurisdictions, including the most active crypto jurisdictions. Our goal is to service your needs in the best possible way leveraging the PwC network and allowing you to make your project a success. Our crypto clients include crypto exchanges, crypto investors, crypto asset managers, ICOs/IEOs/STOs/stable and asset backed tokens, traditional financial institutions entering the crypto space as well as governments, central banks, regulators and other policy makers looking at the crypto ecosystem. As part of our “one stop shop” offering, we provide an entire range of services to the crypto ecosystem including strategy, legal, regulatory, accounting, tax, governance, risk assurance, audit, cybersecurity, M&A advisory as well as capital raising. More details are available on our global crypto page as well as at the back of this report. 2nd Global Crypto M&A and Fundraising Report April 2020 PwC 2 3 PwC I 2nd Global Crypto M&A and Fundraising Report 5 Key takeaways when comparing 2018 vs 2019 There -
Vulnerability of Blockchain Technologies to Quantum Attacks
Vulnerability of Blockchain Technologies to Quantum Attacks Joseph J. Kearneya, Carlos A. Perez-Delgado a,∗ aSchool of Computing, University of Kent, Canterbury, Kent CT2 7NF United Kingdom Abstract Quantum computation represents a threat to many cryptographic protocols in operation today. It has been estimated that by 2035, there will exist a quantum computer capable of breaking the vital cryptographic scheme RSA2048. Blockchain technologies rely on cryptographic protocols for many of their essential sub- routines. Some of these protocols, but not all, are open to quantum attacks. Here we analyze the major blockchain-based cryptocurrencies deployed today—including Bitcoin, Ethereum, Litecoin and ZCash, and determine their risk exposure to quantum attacks. We finish with a comparative analysis of the studied cryptocurrencies and their underlying blockchain technologies and their relative levels of vulnerability to quantum attacks. Introduction exist to allow the legitimate owner to recover this account. Blockchain systems are unlike other cryptosys- tems in that they are not just meant to protect an By contrast, in a blockchain system, there is no information asset. A blockchain is a ledger, and as central authority to manage users’ access keys. The such it is the asset. owner of a resource is by definition the one hold- A blockchain is secured through the use of cryp- ing the private encryption keys. There are no of- tographic techniques. Notably, asymmetric encryp- fline backups. The blockchain, an always online tion schemes such as RSA or Elliptic Curve (EC) cryptographic system, is considered the resource— cryptography are used to generate private/public or at least the authoritative description of it. -
BLOCK by BLOCK a Comparative Analysis of the Leading Distributed Ledgers
BLOCK BY BLOCK A Comparative Analysis of the Leading Distributed Ledgers Table of Contents EXECUTIVE SUMMARY 3 PRELIMINARY MATTERS 4 A NOTE ON METHODOLOGY 4 THE EVOLUTION OF DISTRIBUTED LEDGERS 5 SEC. 1 : TECHNICAL STRUCTURE & FEATURE SET 7 PUBLIC OR PRIVATE? 7 PERMISSIONED OR PERMISSIONLESS? 8 CONSENSUS MECHANISM 9 LANGUAGES SUPPORTED 10 TRANSACTION RATES 11 SMART CONTRACTS 12 ADDITIONAL FEATURES 13 SEC. 2 : BUSINESS CONSIDERATIONS 14 PROJECT GOVERNANCE 14 LICENSING 16 THIRD PARTY SUPPORT 16 DEVELOPER SUPPORT 17 PUBLISHER SUPPORT 18 BLOCKCHAIN AS A SERVICE (BAAS) PROVIDERS 19 PARTNERSHIPS 21 ASSOCIATED COSTS 22 PRICING 22 COST PER TRANSACTION 23 ENERGY CONSUMPTION 24 SEC. 3 : HEALTH INDICATORS 25 DEVELOPMENT ACTIVITY 25 MINDSHARE 27 PROJECT SITE POPULARITY 28 SEARCH ENGINE QUERY VOLUME 29 FINANCIAL STRENGTH INDICATORS 30 MARKET CAP 30 24 HOUR TRADING VOLUME 31 VENTURE CAPITAL AND INVESTORS 32 NODES ONLINE 33 WEISS CRYPTOCURRENCY RANKINGS 34 SIGNIFICANT DEPLOYMENTS 35 CONCLUSIONS 36 PUBLIC LEDGERS 37 PRIVATE LEDGERS 37 PROJECTS TO WATCH 40 APPENDIX A. PROJECT LINKS 42 MERCY CORPS 2 EXECUTIVE SUMMARY Purpose This report compares nine distributed ledger platforms on nearly 30 metrics What’s Included related to the capabilities and the health of each project. The analysis looks at a broad range of indicators -- both direct and indirect -- with the goal of Bitcoin synthesizing trends and patterns that define the market leaders. Corda Ethereum Audience Hyperledger Fabric Multichain This paper is intended for readers already familiar with distributed ledger NEO technologies and will prove most useful to those that are currently evaluating NXT platforms in order to make a decision where to build or deploy applications. -
Ebay Response to Carl Icahn
February 24, 2014 eBay Inc. Responds to Carl Icahn's Feb. 24 Open Letter to Stockholders SAN JOSE, Calif.--(BUSINESS WIRE)-- New eBay shareholder Carl Icahn has cherry-picked old news clips and anecdotes out of context to attack the integrity of two of the most respected, accomplished and value-driven technology leaders in Silicon Valley. Marc Andreessen and Scott Cook bring extraordinary insight, expertise and leadership to eBay's board, which is scrupulous in its governance practices and fully transparent with regard to its directors' other affiliations and businesses. And eBay Inc. President and CEO John Donahoe is widely respected for his turnaround of eBay and leadership of the company over the past six years. As we are sure our other shareholders would agree, we prefer to engage in more constructive and substantive discussions of why, in our view, PayPal and eBay are better together. Instead, Mr. Icahn unfortunately has resorted to mudslinging attacks against two impeccably qualified directors. Mr. Icahn has nominated two of his employees to eBay's board. As we have said, the board's nominating committee will review the nominations of his employees in due course. Even if our board does not support the nominations, ultimately shareholders will decide whether they believe Mr. Icahn's employees are better qualified than directors such as Mr. Cook (Mr. Andreessen is not up for re-election this year) to sit on the board of a leading technology company. The board has been clear in its view that shareholders are best served by keeping PayPal part of eBay. The board regularly assesses all strategic options for the company; should circumstances change the board is entirely capable of evaluating alternatives for optimizing shareholder value. -
THE FUTURE of IDEAS This Work Is Licensed Under a Creative Commons Attribution-Noncommercial License (US/V3.0)
less_0375505784_4p_fm_r1.qxd 9/21/01 13:49 Page i THE FUTURE OF IDEAS This work is licensed under a Creative Commons Attribution-Noncommercial License (US/v3.0). Noncommercial uses are thus permitted without any further permission from the copyright owner. Permissions beyond the scope of this license are administered by Random House. Information on how to request permission may be found at: http://www.randomhouse.com/about/ permissions.html The book maybe downloaded in electronic form (freely) at: http://the-future-of-ideas.com For more permission about Creative Commons licenses, go to: http://creativecommons.org less_0375505784_4p_fm_r1.qxd 9/21/01 13:49 Page iii the future of ideas THE FATE OF THE COMMONS IN A CONNECTED WORLD /// Lawrence Lessig f RANDOM HOUSE New York less_0375505784_4p_fm_r1.qxd 9/21/01 13:49 Page iv Copyright © 2001 Lawrence Lessig All rights reserved under International and Pan-American Copyright Conventions. Published in the United States by Random House, Inc., New York, and simultaneously in Canada by Random House of Canada Limited, Toronto. Random House and colophon are registered trademarks of Random House, Inc. library of congress cataloging-in-publication data Lessig, Lawrence. The future of ideas : the fate of the commons in a connected world / Lawrence Lessig. p. cm. Includes index. ISBN 0-375-50578-4 1. Intellectual property. 2. Copyright and electronic data processing. 3. Internet—Law and legislation. 4. Information society. I. Title. K1401 .L47 2001 346.04'8'0285—dc21 2001031968 Random House website address: www.atrandom.com Printed in the United States of America on acid-free paper 24689753 First Edition Book design by Jo Anne Metsch less_0375505784_4p_fm_r1.qxd 9/21/01 13:49 Page v To Bettina, my teacher of the most important lesson. -
Blockchain and the Creative Industries: Provocation Paper © Ellie Rennie, Jason Potts and Ana Pochesneva, 2019
Provocation Paper Blockchain and the Creative Industries Ellie Rennie, Jason Potts, Ana Pochesneva RMIT Blockchain Innovation Hub November 2019 This provocation paper has been prepared at the request of the Australia Council for the Arts, Screen Australia and the Australian Film, Television and Radio School. Table of contents Executive Summary .................................................................................................................................3 Introduction .................................................................................................................................................4 1 The creative industries today ...........................................................................................................5 1.1 Policy responses to date ..................................................................................................................5 1.2 Challenges facing creative practitioners ................................................................................5 1.2.1 Time factors ......................................................................................................................................6 1.2.2 Business skills ...................................................................................................................................6 1.2.3 Disintermediation ...........................................................................................................................6 1.3 Environment .........................................................................................................................................7 -
The Economic Limits of Bitcoin and the Blockchain∗†
The Economic Limits of Bitcoin and the Blockchain∗† Eric Budish‡ June 5, 2018 Abstract The amount of computational power devoted to anonymous, decentralized blockchains such as Bitcoin’s must simultaneously satisfy two conditions in equilibrium: (1) a zero-profit condition among miners, who engage in a rent-seeking competition for the prize associated with adding the next block to the chain; and (2) an incentive compatibility condition on the system’s vulnerability to a “majority attack”, namely that the computational costs of such an attack must exceed the benefits. Together, these two equations imply that (3) the recurring, “flow”, payments to miners for running the blockchain must be large relative to the one-off, “stock”, benefits of attacking it. This is very expensive! The constraint is softer (i.e., stock versus stock) if both (i) the mining technology used to run the blockchain is both scarce and non-repurposable, and (ii) any majority attack is a “sabotage” in that it causes a collapse in the economic value of the blockchain; however, reliance on non-repurposable technology for security and vulnerability to sabotage each raise their own concerns, and point to specific collapse scenarios. In particular, the model suggests that Bitcoin would be majority attacked if it became sufficiently economically important — e.g., if it became a “store of value” akin to gold — which suggests that there are intrinsic economic limits to how economically important it can become in the first place. ∗Project start date: Feb 18, 2018. First public draft: May 3, 2018. For the record, the first large-stakes majority attack of a well-known cryptocurrency, the $18M attack on Bitcoin Gold, occurred a few weeks later in mid-May 2018 (Wilmoth, 2018; Wong, 2018). -
Industry Report 2019 Loom Network - One Basechain to Rule Them All Table of Contents
LOOM NETWORK Industry report 2019 Loom Network - One Basechain to rule them all Table of contents Introduction 3 Loom Network’s goal 3 Loom Network’s performance 4 Token volumes 4 Daily active wallets 5 Number of dapps 6 Token price 7 Future roadmap 7 Conclusions 8 Key Takeaways • By positioning itself as truly cross-platform and the “universal Layer 2” protocol, Loom has gained increased adoption among the developer community • This has resulted in growing protocol metrics over the past months (DAUs, Token Volumes and number of deployed dapps) • There is a long list of Loom dapps currently in development (mostly games) • Great potential remains, but too early for reaching a final verdict over the protocols success 2 Introduction Scalability is one of the hottest topics in the world of blockchain and dapps. This is especially the case for Ethereum. It remains the most popular blockchain for deploying dapps, but from CryptoKitties in late 2017 to more recent issues with gambling dapps such as FairWin, it’s suffered from serious network congestion. Of course, there are different ways to solve such issues. The move away from a Proof of Work consensus as part of Ethereum 2.0 is one, but in the meantime, we’ve seen an explosion in the number of Layer 2 solutions such as Loom Network’s Basechain (previously called PlasmaChain). These allow developers to overcome scalability issues on a base layer by offloading operations to their own connected chains. In the case of Loom Network, its Basechain is a network of delegated Proof of Stake sidechains secured by more than 21 delegators. -
Artificial Intelligence Integrated Blockchain Technology for Decentralized Applications and Smart Contracts
International Journal of Advanced Science and Technology Vol. 29, No.02, (2020), pp. 1023-1031 Artificial Intelligence Integrated Blockchain Technology for Decentralized Applications and Smart Contracts MAAN NAWAF ABBOOD Al-Imam Al-Adham college Abstract In the present period, Blockchain Technology is one of the key regions of research just as execution explicitly in the space of Cryptocurrency. Presently days, various advanced digital forms of money are very conspicuous and shared all through the world in spite of enormous analysis and debates. These cryptographic forms of money incorporate BitCoin, Ethereum, LiteCoin, PeerCoin, GridCoin, PrimeCoin, Ripple, Nxt, DogeCoin, NameCoin, AuroraCoin, Dash, Neo, NEM, PotCoin, TitCoin, Verge, Stellar, VertCoin, Tether, Zcash and numerous others. These blockchain based digital forms of money don't have any middle of the road bank or installment passage to record the log of the transactions. That is the primary reason in light of which numerous nations are not permitting the cryptographic forms of money as legitimate cash transaction. In any case, these blockchain based cryptographic forms of money are extremely celebrated and utilized as a result of colossal security highlights. This manuscript is focusing on the blockchain technology that is directly associated as the application domain of artificial intelligence. Keywords: Artificial Intelligence, AI, AI based Blockchain, Blockchain Security Introduction The blockchain organize is having a square of records in which every single record is related with the dynamic cryptography so every one of the transactions can be scrambled with no likelihood of sniffing or hacking endeavors [1, 2]. In current situation, the blockchain innovation is progressively engaged towards cryptographic forms of money in which the disseminated record is kept up for the transactions [3, 4].