Basic Manual on the Detection and Investigation of the Laundering of Crime Proceeds Using Virtual Currencies
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Enforcement Trends in Cryptocurrency
Latham & Watkins Financial Institutions Group & White Collar December 9, 2015 | Number 1904 Defense & Investigations Practice Enforcement Trends in Cryptocurrency Cryptocurrency is on the rise...and so are enforcement actions. In less than a decade, cyptocurrencies have grown from a novelty reserved for those dealing in the illicit into a robust platform embraced by financial institutions and businesses alike. Wall Street and strategic investors have increasingly taken note, working to adapt their technology, streamline market trading and integrate cryptocurrency into everyday financial transactions. The rapid adoption of cryptocurrencies has also led to increased government enforcement activity. These actions evidence US regulators’ appetite to investigate fraud and other violations linked to cryptocurrency — often using traditional laws and regulations. Given this increased government scrutiny, financial institutions and traders should understand how regulators have policed the virtual world in the past in order to be prepared for the future. Government Enforcement Actions in the Cryptocurrency Space Unsurprisingly, government regulators, including the Securities and Exchange Commission (SEC), the Department of Justice (DOJ), the Commodities Futures Trading Commission (CFTC), the Federal Trade Commission (FTC) and the Financial Crimes Enforcement Network (FinCEN), have become increasingly active in policing the cryptocurrency space. The below enforcement actions provide a bird’s-eye view of how the enforcement framework for cryptocurrencies -
The Advantages and Disadvantages of Bitcoin Payments in the New Economy Carina-Elena Stegăroiu, Lecturer Phd, „Constantin Br
Annals of the „Constantin Brâncuşi” University of Târgu Jiu, Economy Series, Issue 1/2018 THE ADVANTAGES AND DISADVANTAGES OF BITCOIN PAYMENTS IN THE NEW ECONOMY CARINA-ELENA STEGĂROIU, LECTURER PHD, „CONSTANTIN BRÂNCUŞI” UNIVERSITY, TÂRGU JIU, ROMANIA [email protected] Abstract In the Internet economy, with the help of cryptography, a branch of mathematics dealing with the security of information, as well as authentication and restriction of access to a computer system, a new digital coin as an alternative to national currencies appeared. In accomplishing this, using both mathematical methods (taking advantage of, for example, the difficulty of factorizing very large numbers), and quantum encryption methods. Throughout the world, information technology companies are focusing on information protection, inventing day-to-day methods with greater durability. In the horizon of Information Security, Quantum Cryptography has emerged, generating new possibilities in that field, hoping that data will be better protected and that the digital currency will resist over time and eventually evolve in the future, although Kurzweil, Bitcoin's pioneering technology is unlikely to be used in this respect. The idea of virtual alternatives to national currencies is not new, with advantages and disadvantages. The advantages of this coin are high payment freedom, transparency of information, high security, reduced risks for traders. Among the disadvantages we highlight the risk and volatility, the lack of notification and understanding, with incomplete functions, but which are developing, so Bitcoin is not perfect. Keywords: bitcoin, criptografie, methodology, economic growth, economic agent, branch production, virtual economy, monedă digitală Classification JEL: F60, F61. F62, F63 1. Introduction The idea of virtual alternatives to national currencies is not a new one, Iceland being a country that in April issued its own virtual modular Auroracoin, distributing it to the population. -
YEUNG-DOCUMENT-2019.Pdf (478.1Kb)
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. -
Money Laundering Using Cryptocurrency: the Case of Bitcoin!
Athens Journal of Law - Volume 7, Issue 2, April 2021 – Pages 253-264 Money Laundering using Cryptocurrency: The Case of Bitcoin! By Gaspare Jucan Sicignano* The bitcoin, one of the most discussed topics in recent years, is a virtual currency with enormous potential and can be used almost immediately with no intervention from financial institutions. It has spread rapidly over the last few years, and all financial and governmental institutions have warned of the risk of its use for money laundering. The paper focuses on this aspect in order to understand if any purchases of bitcoins, using illicit money, can come under the anti-money laundering criminal law. Keywords: Bitcoin; Money laundering; Italian law; Cryptocurrency. Introduction The bitcoin1 is a virtual, decentralised and partially anonymous currency based on cryptography and peer-to-peer technology2. With bitcoins it is possible to buy any type of good or service securely and rapidly. Transactions need not be authorised by a central entity; rather, they are validated by all users of the platform. The system is totally secure, since it is practically impossible to hack the protocol3. Bitcoin has been much criticised over the last few years; it has quickly become public enemy number one for everything from financing terrorism to drug dealing to money laundering. It has also recently been said that bitcoin would pollute the planet due to the resources required for mining4. This paper will attempt to analyse in depth the relationship between the bitcoin and money laundering in Italian law. It will analyse the warnings issued by authorities in various sectors, as well as the opinions expressed in Italian legal literature regarding the possibility of committing money laundering and self- laundering crimes in various operations carried out using virtual currency. -
Linking Wallets and Deanonymizing Transactions in the Ripple Network
Proceedings on Privacy Enhancing Technologies ; 2016 (4):436–453 Pedro Moreno-Sanchez*, Muhammad Bilal Zafar, and Aniket Kate* Listening to Whispers of Ripple: Linking Wallets and Deanonymizing Transactions in the Ripple Network Abstract: The decentralized I owe you (IOU) transac- 1 Introduction tion network Ripple is gaining prominence as a fast, low- cost and efficient method for performing same and cross- In recent years, we have observed a rather unexpected currency payments. Ripple keeps track of IOU credit its growth of IOU transaction networks such as Ripple [36, users have granted to their business partners or friends, 40]. Its pseudonymous nature, ability to perform multi- and settles transactions between two connected Ripple currency transactions across the globe in a matter of wallets by appropriately changing credit values on the seconds, and potential to monetize everything [15] re- connecting paths. Similar to cryptocurrencies such as gardless of jurisdiction have been pivotal to their suc- Bitcoin, while the ownership of the wallets is implicitly cess so far. In a transaction network [54, 55, 59] such as pseudonymous in Ripple, IOU credit links and transac- Ripple [10], users express trust in each other in terms tion flows between wallets are publicly available in an on- of I Owe You (IOU) credit they are willing to extend line ledger. In this paper, we present the first thorough each other. This online approach allows transactions in study that analyzes this globally visible log and charac- fiat money, cryptocurrencies (e.g., bitcoin1) and user- terizes the privacy issues with the current Ripple net- defined currencies, and improves on some of the cur- work. -
Het Juridisch Statuut Van Virtuele Munteenheden
KU LEUVEN FACULTEIT RECHTSGELEERDHEID Academiejaar 2014 - 2015 Het juridisch statuut van virtuele munteenheden Bitcoin’s pragmatic legal vacuum Promotor : Prof. Dr. M.E. Storme Masterscriptie, ingediend door Begeleider: Drs. F. Helsen Cedric Hauben bij het eindexamen voor de graad van MASTER IN DE RECHTEN “There are few things more fascinating in our jurisprudence than the organization of what comes, almost immediately, to be perceived as a new field of law” - Grant GILMORE, 1974 Sterling professor of Law, Yale Univesity 2 Inhoudstafel Inhoudstafel ...................................................................................................................................... 3 Samenvatting .................................................................................................................................... 7 Dankwoord ........................................................................................................................................ 8 Inleiding ............................................................................................................................................. 9 Hoofdstuk 1: Situering ............................................................................................................... 11 §1.1. Wat is geld? ...................................................................................................................... 11 1.1.1. Definitie ........................................................................................................................................ -
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). -
Printpdf/Libra-3
LIBRA drishtiias.com/printpdf/libra-3 Why in News? Facebook has announced the launch of a cryptocurrency called Libra by 2020. While this signals facebook’s plans to expand into the global digital currency market, it has also raised privacy concerns. Digi Currency: Facebook’s cryptocurrency Libra will allow smartphone users to buy services digitally from their phone. Digital Wallet: Libra will be stored in a digital wallet called Calibra. Calibra is a standalone app on a user's smartphone or housed within Facebook-owned services such as WhatsApp and Messenger. How can users buy Libra? Users will need to sign up for an account using a government-issued ID to use Calibra wallet. Users will then be able to convert their money into Libra and add it to their digital wallet. Once in place, the currency can be used to pay for everyday transactions. 1/5 Libra Association: The cryptocurrency will be run by the Libra Association, a Geneva-based entity that has founding partners, including Facebook, Mastercard, Visa, Uber, and the Vodafone group. Libra Reserve: Libra will be backed by a reserve of assets in the form of securities (bank deposits and short-term government securities) and fiat currencies (like dollar, pound) to give it an intrinsic value and ensure stability. Anyone with Libra will have an assurance that they can convert their digital currency into local fiat currency based on an exchange rate. Libra Blockchain: Every Libra payment is permanently written into the Libra blockchain which is a cryptographically authenticated database and acts as a public online ledger designed to handle 1,000 transactions per second. -
Blocksci: Design and Applications of a Blockchain Analysis Platform
BlockSci: Design and applications of a blockchain analysis platform Harry Kalodner Steven Goldfeder Alishah Chator [email protected] [email protected] [email protected] Princeton University Princeton University Johns Hopkins University Malte Möser Arvind Narayanan [email protected] [email protected] Princeton University Princeton University ABSTRACT to partition eectively. In fact, we conjecture that the use of a tra- Analysis of blockchain data is useful for both scientic research ditional, distributed transactional database for blockchain analysis and commercial applications. We present BlockSci, an open-source has innite COST [5], in the sense that no level of parallelism can software platform for blockchain analysis. BlockSci is versatile in outperform an optimized single-threaded implementation. its support for dierent blockchains and analysis tasks. It incorpo- BlockSci comes with batteries included. First, it is not limited rates an in-memory, analytical (rather than transactional) database, to Bitcoin: a parsing step converts a variety of blockchains into making it several hundred times faster than existing tools. We a common, compact format. Currently supported blockchains in- describe BlockSci’s design and present four analyses that illustrate clude Bitcoin, Litecoin, Namecoin, and Zcash (Section 2.1). Smart its capabilities. contract platforms such as Ethereum are outside our scope. Second, This is a working paper that accompanies the rst public release BlockSci includes a library of useful analytic and visualization tools, of BlockSci, available at github.com/citp/BlockSci. We seek input such as identifying special transactions (e.g., CoinJoin) and linking from the community to further develop the software and explore addresses to each other based on well-known heuristics (Section other potential applications. -
Merged Mining: Curse Or Cure?
Merged Mining: Curse or Cure? Aljosha Judmayer, Alexei Zamyatin, Nicholas Stifter, Artemios Voyiatzis, Edgar Weippl SBA Research, Vienna, Austria (firstletterfirstname)(lastname)@sba-research.org Abstract: Merged mining refers to the concept of mining more than one cryp- tocurrency without necessitating additional proof-of-work effort. Although merged mining has been adopted by a number of cryptocurrencies already, to this date lit- tle is known about the effects and implications. We shed light on this topic area by performing a comprehensive analysis of merged mining in practice. As part of this analysis, we present a block attribution scheme for mining pools to assist in the evaluation of mining centralization. Our findings disclose that mining pools in merge-mined cryptocurrencies have operated at the edge of, and even beyond, the security guarantees offered by the underlying Nakamoto consensus for ex- tended periods. We discuss the implications and security considerations for these cryptocurrencies and the mining ecosystem as a whole, and link our findings to the intended effects of merged mining. 1 Introduction The topic of merged mining has received little attention from the scientific community, despite having been actively employed by a number of cryptocurrencies for several years. New and emerging cryptocurrencies such as Rootstock continue to consider and expand on the concept of merged mining in their designs to this day [19]. Merged min- ing refers to the process of searching for proof-of-work (PoW) solutions for multiple cryptocurrencies concurrently without requiring additional computational resources. The rationale behind merged mining lies in leveraging on the computational power of different cryptocurrencies by bundling their resources instead of having them stand in direct competition, and also to serve as a bootstrapping mechanism for small and fledgling networks [27, 33]. -
Does the Hashrate Affect the Bitcoin Price?
Journal of Risk and Financial Management Article Does the Hashrate Affect the Bitcoin Price? Dean Fantazzini 1,* and Nikita Kolodin 2 1 Moscow School of Economics, Moscow State University, Leninskie Gory, 1, Building 61, Moscow 119992, Russia 2 Higher School of Economics, Moscow 109028, Russia; [email protected] * Correspondence: [email protected]; Tel.: +7-4955105267; Fax: +7-4955105256 Received: 30 September 2020; Accepted: 27 October 2020; Published: 30 October 2020 Abstract: This paper investigates the relationship between the bitcoin price and the hashrate by disentangling the effects of the energy efficiency of the bitcoin mining equipment, bitcoin halving, and of structural breaks on the price dynamics. For this purpose, we propose a methodology based on exponential smoothing to model the dynamics of the Bitcoin network energy efficiency. We consider either directly the hashrate or the bitcoin cost-of-production model (CPM) as a proxy for the hashrate, to take any nonlinearity into account. In the first examined subsample (01/08/2016–04/12/2017), the hashrate and the CPMs were never significant, while a significant cointegration relationship was found in the second subsample (11/12/2017–24/02/2020). The empirical evidence shows that it is better to consider the hashrate directly rather than its proxy represented by the CPM when modeling its relationship with the bitcoin price. Moreover, the causality is always unidirectional going from the bitcoin price to the hashrate (or its proxies), with lags ranging from one week up to six weeks later. These findings are consistent with a large literature in energy economics, which showed that oil and gas returns affect the purchase of the drilling rigs with a delay of up to three months, whereas the impact of changes in the rig count on oil and gas returns is limited or not significant. -
Alternative Mining Puzzles
Cryptocurrency Technologies Alternative Mining Puzzles Alternative Mining Puzzles • Essential Puzzle Requirements • ASIC-Resistant Puzzles • Proof-of-Useful-Work • Non-outsourceable Puzzles • Proof-of-Stake “Virtual Mining” Puzzles (recap) Incentive system steers participants Basic features of Bitcoin’s puzzle The puzzle is difficult to solve, so attacks are costly … but not too hard, so honest miners are compensated Q: What other features could a puzzle have? 1 Cryptocurrency Technologies Alternative Mining Puzzles On today’s menu . Alternative puzzle designs Used in practice, and speculative Variety of possible goals ASIC resistance, pool resistance, intrinsic benefits, etc. Essential security requirements Alternative Mining Puzzles • Essential Puzzle Requirements • ASIC-Resistant Puzzles • Proof-of-Useful-Work • Non-outsourceable Puzzles • Proof-of-Stake “Virtual Mining” 2 Cryptocurrency Technologies Alternative Mining Puzzles Puzzle Requirements A puzzle should ... – be cheap to verify – have adjustable difficulty – <other requirements> – have a chance of winning that is proportional to hashpower • Large player get only proportional advantage • Even small players get proportional compensation Bad Puzzle: a sequential Puzzle Consider a puzzle that takes N steps to solve a “Sequential” Proof of Work N Solution Found! 3 Cryptocurrency Technologies Alternative Mining Puzzles Bad Puzzle: a sequential Puzzle Problem: fastest miner always wins the race! Solution Found! Good Puzzle => Weighted Sample This property is sometimes called progress free. 4 Cryptocurrency Technologies Alternative Mining Puzzles Alternative Mining Puzzles • Essential Puzzle Requirements • ASIC-Resistant Puzzles • Proof-of-Useful-Work • Non-outsourceable Puzzles • Proof-of-Stake “Virtual Mining” ASIC Resistance – Why?! Goal: Ordinary people with idle laptops, PCs, or even mobile phones can mine! Lower barrier to entry! Approach: Reduce the gap between custom hardware and general purpose equipment.