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Virtual Currencies and Terrorist Financing : Assessing the Risks And
DIRECTORATE GENERAL FOR INTERNAL POLICIES POLICY DEPARTMENT FOR CITIZENS' RIGHTS AND CONSTITUTIONAL AFFAIRS COUNTER-TERRORISM Virtual currencies and terrorist financing: assessing the risks and evaluating responses STUDY Abstract This study, commissioned by the European Parliament’s Policy Department for Citizens’ Rights and Constitutional Affairs at the request of the TERR Committee, explores the terrorist financing (TF) risks of virtual currencies (VCs), including cryptocurrencies such as Bitcoin. It describes the features of VCs that present TF risks, and reviews the open source literature on terrorist use of virtual currencies to understand the current state and likely future manifestation of the risk. It then reviews the regulatory and law enforcement response in the EU and beyond, assessing the effectiveness of measures taken to date. Finally, it provides recommendations for EU policymakers and other relevant stakeholders for ensuring the TF risks of VCs are adequately mitigated. PE 604.970 EN ABOUT THE PUBLICATION This research paper was requested by the European Parliament's Special Committee on Terrorism and was commissioned, overseen and published by the Policy Department for Citizens’ Rights and Constitutional Affairs. Policy Departments provide independent expertise, both in-house and externally, to support European Parliament committees and other parliamentary bodies in shaping legislation and exercising democratic scrutiny over EU external and internal policies. To contact the Policy Department for Citizens’ Rights and Constitutional Affairs or to subscribe to its newsletter please write to: [email protected] RESPONSIBLE RESEARCH ADMINISTRATOR Kristiina MILT Policy Department for Citizens' Rights and Constitutional Affairs European Parliament B-1047 Brussels E-mail: [email protected] AUTHORS Tom KEATINGE, Director of the Centre for Financial Crime and Security Studies, Royal United Services Institute (coordinator) David CARLISLE, Centre for Financial Crime and Security Studies, Royal United Services Institute, etc. -
Asymmetric Proof-Of-Work Based on the Generalized Birthday Problem
Equihash: Asymmetric Proof-of-Work Based on the Generalized Birthday Problem Alex Biryukov Dmitry Khovratovich University of Luxembourg University of Luxembourg [email protected] [email protected] Abstract—The proof-of-work is a central concept in modern Long before the rise of Bitcoin it was realized [20] that cryptocurrencies and denial-of-service protection tools, but the the dedicated hardware can produce a proof-of-work much requirement for fast verification so far made it an easy prey for faster and cheaper than a regular desktop or laptop. Thus the GPU-, ASIC-, and botnet-equipped users. The attempts to rely on users equipped with such hardware have an advantage over memory-intensive computations in order to remedy the disparity others, which eventually led the Bitcoin mining to concentrate between architectures have resulted in slow or broken schemes. in a few hardware farms of enormous size and high electricity In this paper we solve this open problem and show how to consumption. An advantage of the same order of magnitude construct an asymmetric proof-of-work (PoW) based on a compu- is given to “owners” of large botnets, which nowadays often tationally hard problem, which requires a lot of memory to gen- accommodate hundreds of thousands of machines. For prac- erate a proof (called ”memory-hardness” feature) but is instant tical DoS protection, this means that the early TLS puzzle to verify. Our primary proposal Equihash is a PoW based on the schemes [8], [17] are no longer effective against the most generalized birthday problem and enhanced Wagner’s algorithm powerful adversaries. -
Piecework: Generalized Outsourcing Control for Proofs of Work
(Short Paper): PieceWork: Generalized Outsourcing Control for Proofs of Work Philip Daian1, Ittay Eyal1, Ari Juels2, and Emin G¨unSirer1 1 Department of Computer Science, Cornell University, [email protected],[email protected],[email protected] 2 Jacobs Technion-Cornell Institute, Cornell Tech [email protected] Abstract. Most prominent cryptocurrencies utilize proof of work (PoW) to secure their operation, yet PoW suffers from two key undesirable prop- erties. First, the work done is generally wasted, not useful for anything but the gleaned security of the cryptocurrency. Second, PoW is natu- rally outsourceable, leading to inegalitarian concentration of power in the hands of few so-called pools that command large portions of the system's computation power. We introduce a general approach to constructing PoW called PieceWork that tackles both issues. In essence, PieceWork allows for a configurable fraction of PoW computation to be outsourced to workers. Its controlled outsourcing allows for reusing the work towards additional goals such as spam prevention and DoS mitigation, thereby reducing PoW waste. Meanwhile, PieceWork can be tuned to prevent excessive outsourcing. Doing so causes pool operation to be significantly more costly than today. This disincentivizes aggregation of work in mining pools. 1 Introduction Distributed cryptocurrencies such as Bitcoin [18] rely on the equivalence \com- putation = money." To generate a batch of coins, clients in a distributed cryp- tocurrency system perform an operation called mining. Mining requires solving a computationally intensive problem involving repeated cryptographic hashing. Such problem and its solution is called a Proof of Work (PoW) [11]. As currently designed, nearly all PoWs suffer from one of two drawbacks (or both, as in Bitcoin). -
Short Selling Attack: a Self-Destructive but Profitable 51% Attack on Pos Blockchains
Short Selling Attack: A Self-Destructive But Profitable 51% Attack On PoS Blockchains Suhyeon Lee and Seungjoo Kim CIST (Center for Information Security Technologies), Korea University, Korea Abstract—There have been several 51% attacks on Proof-of- With a PoS, the attacker needs to obtain 51% of the Work (PoW) blockchains recently, including Verge and Game- cryptocurrency to carry out a 51% attack. But unlike PoW, Credits, but the most noteworthy has been the attack that saw attacker in a PoS system is highly discouraged from launching hackers make off with up to $18 million after a successful double spend was executed on the Bitcoin Gold network. For this reason, 51% attack because he would have to risk of depreciation the Proof-of-Stake (PoS) algorithm, which already has advantages of his entire stake amount to do so. In comparison, bad of energy efficiency and throughput, is attracting attention as an actor in a PoW system will not lose their expensive alternative to the PoW algorithm. With a PoS, the attacker needs mining equipment if he launch a 51% attack. Moreover, to obtain 51% of the cryptocurrency to carry out a 51% attack. even if a 51% attack succeeds, the value of PoS-based But unlike PoW, attacker in a PoS system is highly discouraged from launching 51% attack because he would have to risk losing cryptocurrency will fall, and the attacker with the most stake his entire stake amount to do so. Moreover, even if a 51% attack will eventually lose the most. For these reasons, those who succeeds, the value of PoS-based cryptocurrency will fall, and attempt to attack 51% of the PoS blockchain will not be the attacker with the most stake will eventually lose the most. -
Eclipse Attacks on Bitcoin's Peer-To-Peer Network
Eclipse Attacks on Bitcoin’s Peer-to-Peer Network ∗ Ethan Heilman∗ Alison Kendler∗ Aviv Zohar† Sharon Goldberg∗ ∗Boston University †Hebrew University/MSR Israel Abstract While the last few years have seen extensive research We present eclipse attacks on bitcoin’s peer-to-peer net- into the security of bitcoin’s computational proof-of- work. Our attack allows an adversary controlling a suffi- work protocol e.g., [14, 29, 36, 37, 45, 49, 50, 52, 58, 60], cient number of IP addresses to monopolize all connec- less attention has been paid to the peer-to-peer network tions to and from a victim bitcoin node. The attacker can used to broadcast information between bitcoin nodes (see then exploit the victim for attacks on bitcoin’s mining Section 8). The bitcoin peer-to-peer network, which and consensus system, including N-confirmation double is bundled into the core bitcoind implementation, aka., spending, selfish mining, and adversarial forks in the the Satoshi client, is designed to be open, decentralized, blockchain. We take a detailed look at bitcoin’s peer- and independent of a public-key infrastructure. As such, to-peer network, and quantify the resources involved in cryptographic authentication between peers is not used, our attack via probabilistic analysis, Monte Carlo simu- and nodes are identified by their IP addresses (Section 2). lations, measurements and experiments with live bitcoin Each node uses a randomized protocol to select eight nodes. Finally, we present countermeasures, inspired by peers with which it forms long-lived outgoing connec- botnet architectures, that are designed to raise the bar for tions, and to propagate and store addresses of other po- eclipse attacks while preserving the openness and decen- tential peers in the network. -
Coinbase Explores Crypto ETF (9/6) Coinbase Spoke to Asset Manager Blackrock About Creating a Crypto ETF, Business Insider Reports
Crypto Week in Review (9/1-9/7) Goldman Sachs CFO Denies Crypto Strategy Shift (9/6) GS CFO Marty Chavez addressed claims from an unsubstantiated report earlier this week that the firm may be delaying previous plans to open a crypto trading desk, calling the report “fake news”. Coinbase Explores Crypto ETF (9/6) Coinbase spoke to asset manager BlackRock about creating a crypto ETF, Business Insider reports. While the current status of the discussions is unclear, BlackRock is said to have “no interest in being a crypto fund issuer,” and SEC approval in the near term remains uncertain. Looking ahead, the Wednesday confirmation of Trump nominee Elad Roisman has the potential to tip the scales towards a more favorable cryptoasset approach. Twitter CEO Comments on Blockchain (9/5) Twitter CEO Jack Dorsey, speaking in a congressional hearing, indicated that blockchain technology could prove useful for “distributed trust and distributed enforcement.” The platform, given its struggles with how best to address fraud, harassment, and other misuse, could be a prime testing ground for decentralized identity solutions. Ripio Facilitates Peer-to-Peer Loans (9/5) Ripio began to facilitate blockchain powered peer-to-peer loans, available to wallet users in Argentina, Mexico, and Brazil. The loans, which utilize the Ripple Credit Network (RCN) token, are funded in RCN and dispensed to users in fiat through a network of local partners. Since all details of the loan and payments are recorded on the Ethereum blockchain, the solution could contribute to wider access to credit for the unbanked. IBM’s Payment Protocol Out of Beta (9/4) Blockchain World Wire, a global blockchain based payments network by IBM, is out of beta, CoinDesk reports. -
Tenx Whitepaper
PAYMENT PLATFORM WHITEPAPER Final Version: June 21st 2017 1 IMPORTANT NOTICE PLEASE READ THIS SECTION AND THE FOLLOWING SECTIONS ENTITLED “DISCLAIMER OF LIABILITY”, “NO REPRESENTATIONS AND WARRANTIES”, “REPRESENTATIONS AND WARRANTIES BY YOU”, “CAUTIONARY NOTE ON FORWARD-LOOKING STATEMENTS”, “MARKET AND INDUSTRY INFORMATION AND NO CONSENT OF OTHER PERSONS”, “NO ADVICE”, “NO FURTHER INFORMATION OR UPDATE”, “RESTRICTIONS ON DISTRIBUTION AND DISSEMINATION”, “NO OFFER OF SECURITIES OR REGISTRATION” AND “RISKS AND UNCERTAINTIES” CAREFULLY. IF YOU ARE IN ANY DOUBT AS TO THE ACTION YOU SHOULD TAKE, YOU SHOULD CONSULT YOUR LEGAL, FINANCIAL, TAX OR OTHER PROFESSIONAL ADVISOR(S). The PAY tokens are not intended to constitute securities in any jurisdiction. This Whitepaper does not constitute a prospectus or offer document of any sort and is not intended to constitute an offer of securities or a solicitation for investment in securities in any jurisdiction. This Whitepaper does not constitute or form part of any opinion on any advice to sell, or any solicitation of any offer by the distributor/vendor of the PAY tokens (the “Distributor”) to purchase any PAY tokens nor shall it or any part of it nor the fact of its presentation form the basis of, or be relied upon in connection with, any contract or investment decision. The Distributor will be an affiliate of TenX Pte. Ltd. (“TenX”), and will deploy all proceeds of sale of the PAY tokens to fund TenX’s cryptocurrency project, businesses and operations. No person is bound to enter into any contract or binding legal commitment in relation to the sale and purchase of the PAY tokens and no cryptocurrency or other form of payment is to be accepted on the basis of this Whitepaper. -
Bitcoin and Cryptocurrencies Law Enforcement Investigative Guide
2018-46528652 Regional Organized Crime Information Center Special Research Report Bitcoin and Cryptocurrencies Law Enforcement Investigative Guide Ref # 8091-4ee9-ae43-3d3759fc46fb 2018-46528652 Regional Organized Crime Information Center Special Research Report Bitcoin and Cryptocurrencies Law Enforcement Investigative Guide verybody’s heard about Bitcoin by now. How the value of this new virtual currency wildly swings with the latest industry news or even rumors. Criminals use Bitcoin for money laundering and other Enefarious activities because they think it can’t be traced and can be used with anonymity. How speculators are making millions dealing in this trend or fad that seems more like fanciful digital technology than real paper money or currency. Some critics call Bitcoin a scam in and of itself, a new high-tech vehicle for bilking the masses. But what are the facts? What exactly is Bitcoin and how is it regulated? How can criminal investigators track its usage and use transactions as evidence of money laundering or other financial crimes? Is Bitcoin itself fraudulent? Ref # 8091-4ee9-ae43-3d3759fc46fb 2018-46528652 Bitcoin Basics Law Enforcement Needs to Know About Cryptocurrencies aw enforcement will need to gain at least a basic Bitcoins was determined by its creator (a person Lunderstanding of cyptocurrencies because or entity known only as Satoshi Nakamoto) and criminals are using cryptocurrencies to launder money is controlled by its inherent formula or algorithm. and make transactions contrary to law, many of them The total possible number of Bitcoins is 21 million, believing that cryptocurrencies cannot be tracked or estimated to be reached in the year 2140. -
Transparent and Collaborative Proof-Of-Work Consensus
StrongChain: Transparent and Collaborative Proof-of-Work Consensus Pawel Szalachowski, Daniël Reijsbergen, and Ivan Homoliak, Singapore University of Technology and Design (SUTD); Siwei Sun, Institute of Information Engineering and DCS Center, Chinese Academy of Sciences https://www.usenix.org/conference/usenixsecurity19/presentation/szalachowski This paper is included in the Proceedings of the 28th USENIX Security Symposium. August 14–16, 2019 • Santa Clara, CA, USA 978-1-939133-06-9 Open access to the Proceedings of the 28th USENIX Security Symposium is sponsored by USENIX. StrongChain: Transparent and Collaborative Proof-of-Work Consensus Pawel Szalachowski1 Daniel¨ Reijsbergen1 Ivan Homoliak1 Siwei Sun2;∗ 1Singapore University of Technology and Design (SUTD) 2Institute of Information Engineering and DCS Center, Chinese Academy of Sciences Abstract a cryptographically-protected append-only list [2] is intro- duced. This list consists of transactions grouped into blocks Bitcoin is the most successful cryptocurrency so far. This and is usually referred to as a blockchain. Every active pro- is mainly due to its novel consensus algorithm, which is tocol participant (called a miner) collects transactions sent based on proof-of-work combined with a cryptographically- by users and tries to solve a computationally-hard puzzle in protected data structure and a rewarding scheme that incen- order to be able to write to the blockchain (the process of tivizes nodes to participate. However, despite its unprece- solving the puzzle is called mining). When a valid solution dented success Bitcoin suffers from many inefficiencies. For is found, it is disseminated along with the transactions that instance, Bitcoin’s consensus mechanism has been proved to the miner wishes to append. -
Bitflyer Raises Approximately JPY 130 Million in Funds
bitFlyer, Inc Yuzo Kano, CEO bitFlyer Raises JPY 130 million in Funds We are delighted to announce that bitFlyer (Company Headquarters: Chiyoda-ku, Tokyo, Yuzo Kano, CEO), in order to expand its comprehensive Bitcoin platform and marketplace, has closed a fundraising round of approximately JPY 130 million. We are pleased to have received an investment from several third party investment organizations, including the below (titles omitted, in no particular order): RSP Fund No. 5 (Headquarters: Chuo-ku, Tokyo, Akihiko Okamoto, President) GMO Venture Partners (Headquarters: Shibuya-ku, Tokyo, Masatoshi Kumagai, CEO) Bitcoin Opportunity Corp (Headquarters: New York, USA, Barry Silbert, CEO) The purpose of this funding will be to further strengthen our Bitcoin related businesses in the domestic as well as international markets, set up overseas offices, recruit new talent, accelerate service development, and carry out marketing and advertising campaigns to promote business growth. In addition, the synergies gained through close collaboration with our investment partners, customer base expansion, and the strengthening of our revenue base will help to facilitate our global business expansion. We will continue to pursue our primary goals of improving security while providing the best possible services to our customers. Thank you for using bitFlyer. Reference 1. Information Regarding our Investment Partners RSP Fund No. 5 RSP Fund No. 5 is a wholly owned subsidiary of Recruit Holdings, Co., Ltd. Headquartered in Tokyo and with offices in Silicon Valley, RSP invests in and provides management support to IT companies that provide innovative products and services around the world. GMO Venture Partners GMO Venture Partners is the venture capital arm of GMO Internet Group, investing more than JPY 5 billion to 51 companies in total, including 8 listed companies. -
Mastercard Creates Simpli Ed Payments Card O Ering For
NEWS RELEASE Mastercard Creates Simplied Payments Card Oering for Cryptocurrency Companies 7/20/2021 Reduces friction in experience and provides greater choice for consumers by helping crypto companies oer card programs Suite of partners include Circle, Paxos, Evolve Bank & Trust, Metropolitan Commercial Bank, Uphold, BitPay, Apto Payments, i2c Inc. and Galileo Financial Technologies PURCHASE, N.Y.--(BUSINESS WIRE)-- Mastercard announced today it will enhance its card program for cryptocurrency wallets and exchanges, making it simpler for partners to convert cryptocurrency to traditional at currency. Working with Evolve Bank & Trust and Paxos Trust Company, the leading blockchain infrastructure and regulated stablecoin issuance platform, and Circle, a global nancial technology rm and the principal operator of the USD Coin (USDC), a dollar digital currency or stablecoin, Mastercard and its partners will test this new capability to enable more banks and crypto companies to oer a card option to people wanting to spend their digital assets anywhere Mastercard is accepted. Today, when people spend cryptocurrency such as Bitcoin, Bitcoin Cash, Ether, or Litecoin, it must enter and settle on Mastercard’s network as traditional at currency, such as the U.S. dollar. Until now, crypto providers planning to launch or expand card programs could nd it operationally challenging to perform the currency conversion, a critical step preceding the settlement on Mastercard’s network. Mastercard’s engagement with Evolve, Paxos and Circle solves this challenge for players across the industry. Mastercard announced in February 2021 it is preparing to enable select stablecoins directly on its network, expanding the future potential of digital assets and payments. -
3Rd Global Cryptoasset Benchmarking Study
3RD GLOBAL CRYPTOASSET BENCHMARKING STUDY Apolline Blandin, Dr. Gina Pieters, Yue Wu, Thomas Eisermann, Anton Dek, Sean Taylor, Damaris Njoki September 2020 supported by Disclaimer: Data for this report has been gathered primarily from online surveys. While every reasonable effort has been made to verify the accuracy of the data collected, the research team cannot exclude potential errors and omissions. This report should not be considered to provide legal or investment advice. Opinions expressed in this report reflect those of the authors and not necessarily those of their respective institutions. TABLE OF CONTENTS FOREWORDS ..................................................................................................................................................4 RESEARCH TEAM ..........................................................................................................................................6 ACKNOWLEDGEMENTS ............................................................................................................................7 EXECUTIVE SUMMARY ........................................................................................................................... 11 METHODOLOGY ........................................................................................................................................ 14 SECTION 1: INDUSTRY GROWTH INDICATORS .........................................................................17 Employment figures ..............................................................................................................................................................................................................17