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Cryptocurrencies: Threats and Investigative Opportunities for Law Enforcement
Gonzalez, Eva ; Střítecký, Vít (advisor) ; Karásek, Tomáš (referee)
Cryptocurrencies have developed and widely spread within recent years. Their anonymous and decentralised characteristics have attracted criminals who leverage these technologies to sell and purchase illicit goods on the black market while concealing their identities and avoid prosecution. The new development of cryptocurrencies and their underlying architecture blockchain has had positive and negative effects on the success of law enforcement investigations. It is perceived as a threat when there are factors that increase the complexity of law enforcement investigations due to the use of highly anonymous cryptocurrencies and Bitcoin mixers. Cryptocurrencies are also perceived as a threat when criminals use them for money laundering purposes. Conversely, the rise of cryptocurrencies also introduces new opportunities for law enforcement investigations. Records of cryptocurrency transactions in the blockchain help law enforcement to trace suspicious addresses by the emergence and improvement of analysis tools. In parallel, anti- money laundering (AML) regulations and the financial authorities have proved to play a key role in fighting against money laundering and gather information on suspicious activities carried out through financial institutions. The analysis of this dissertation sets forth that...
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Blockchain at the European Level
Drašković, Teodora ; Kunertová, Tereza (advisor) ; Vondráčková, Aneta (referee)
Blockchain at the European Level Abstract The objective of this master thesis is to provide a basic overview of the blockchain technology, its features and its potential utilization, including an overview of European legal regulations that might be applicable to the technology, under certain conditions. In the first chapter, the master's thesis sets forth the legal framework of the EU primary law that establishes or can establish the EU's competence to act in the matters of blockchain technology, depending on its legal qualification (especially in the context of the internal market - namely the free movement of services and capital). The second and third chapters provide essential description of features of blockchain and cryptocurrency and related services. A more detailed description is provided in Annexes I-IV of this thesis. Further, the legal status and applicable regulation of cryptocurrencies are assessed at the European and national levels and in terms of other global jurisdictions. The assessment also includes the recent CJEU's judgment in the case Hedqvist, according to which bidirectional exchange services (purchase of cryptocurrency for fiat currency and vice versa) are to be exempted from VAT obligation under the VAT directive. In line with the CJEU's reasoning and the Advocate General's...
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Activity Alarm for Cryptocurrency Blockchains
Vokráčko, Lukáš ; Grégr, Matěj (referee) ; Veselý, Vladimír (advisor)
Cryptocurrencies are becoming popular and the demand for monitoring transactions inside them increases alongside with it. In this thesis, I describe few of the most widespread cryptocurrencies built on top of a blockchain and how to obtain information of their transactions in order to raise alarms. I discuss existing solutions and describe application Cryptoalarm designed for monitoring transactions involving specific addresses in order to raise alarms. Cryptoalarm scans blockchains of cryptocurrencies such as Bitcoin, Bitcoin Cash, Litecoin, Zcash, Dash, Ethereum and raises alarms about address activities in real-time.
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Forensic Analysis of Cryptocurrency Mining Servers
Kelečéni, Jakub ; Grégr, Matěj (referee) ; Veselý, Vladimír (advisor)
This thesis focuses on the mining of cryptocurrency with emphasis on analysis of communication between miner and server. It describes basic principles of cryptocurrencies, mining and employed communication protocols. The next part of thesis is about design and implement modification of existing system (catalogue). This modification will add temporality to the catalog, what increase reliability of stored metadata. Description, functionality and purpose of existing system is included in the next text.
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Cryptocurrencies
Šindelářová, Anna ; Haupt, Jaromír (referee) ; Smutný, Milan (advisor)
Tato bakalářská práce se zaměřuje na téma Kryptoměny. Práce se zabývá vznikem a vývojem kryptoměn, jejich využitím a popisem jejich základních principů fungování. Více podrobně jsou v této práci popsány 3 vybrané kryptoměny – Bitcoin, Ethereum a Monero. Cílem této práce je provést porovnání těchto vybraných kryptoměn, které je popsáno v poslední kapitole.
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Bitcoin from the perspective of law and economics and its implications
Szewczyková, Julie ; Chytilová, Helena (advisor) ; Dupáková, Lenka (referee)
SELECTED ASPECTS OF BITCOIN AND ITS IMPLICATIONS FROM THE STANDPOINT OF THE LAW AND ECONOMICS Abstract Bitcoin is one of the best-known examples of a decentralized convertible cryptocurrency based on blockchain technology. The diploma thesis deals with the main aspects of bitcoin and bitcoin payment networks in complex economic analysis based on the use of standard economic apparatus. The economic analysis is backed by a thorough and relevant legal research. The main goal of the diploma thesis is complex economic and legal analysis of bitcoin. In economic analysis, the emphasis is put on the use of supply-demand analysis, which outlines the basic factors affecting supply and demand for bitcoins. Based on a clear delineation of these factors, the thesis is able to analyse specific aspects of bitcoin. Diploma thesis analyzes the impacts of decentralized setting, as well as risks associated with anonymity of users, crime in connection with bitcoin, time delays in transaction verification, technical and energetic demands on mining, high transaction costs and internet connection needs. Each of these aspects is compared to existing payment institutions or systems. The thesis also examines the legal regulation of bitcoin. Due to the absence of a complex legal regulation, the diploma thesis tries to apply the...
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Cryptocurrencies Blockchain Analysis
Očenáš, Martin ; Grégr, Matěj (referee) ; Veselý, Vladimír (advisor)
This thesis describes important existing cryptocurrencies and their basis principles. Especially it describes differences between this cryptocurrencies and theid basis principles. Also describes posibilites for analysis of Bitcoin blockchain. Next part describes improvments of tool for blockchain analysis. Futher it describes cryptocurrency analyzing tool, and it's implemented extensions.
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Impact of bitcoin and blockchain technology on the financial services sector
Halačka, Karel ; Rajl, Jiří (advisor) ; Plíva, Rostislav (referee)
The subject of this bachelor thesis is the impact of bitcoin and blockchain technology on the sector of financial services. The aim of the thesis is to identify the impact and consequences arising from deployment of blockchain in the sectors of banking, insurance and capital markets. At the beginning, the basic concepts associated with bitcoins and blockchain are explained. Followed by the first part which is dedicated to theoretical bases of bitcoin and blockchain. The other sections are already dealing with specific cases of blockchain use in the above-mentioned sectors, while trying to outline the implications that the deployment of this technology are related to. At the very end is a comprehensive SWOT analysis of the blockchain in the context of the financial services sector.
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Comparison of Ether and Bitcoin
Šperl, Josef ; Revenda, Zbyněk (advisor) ; Metrah, Samy (referee)
In bachelor thesis, reader is introduced to elemental attributes of cryptocurrency, functions they can fulfil, advantages and disadvantages. He is informed about how cryptocurrency coins are created and released, and also how the payments work, especially in case of Ether, and other possible use of the platform it is built on for improving communicational and programational processes. The thesis is only theoretical. It analyze possibilities of investing into cryptocurrency and projects based on them. There is also explained the potencial of Ether, that can lead to great evolution of communication technology, and possibilities how the blockchain technology can be used to keep and transport data on a decentralized basis.
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Changes of financial system in the context of financial crisis
Karan, Boris ; Šíma, Ondřej (advisor) ; Pour, Jiří (referee)
In this paper, we analyse the relation between financial system and financial crises. Our goal is to find how, on the one hand, changes in the financial system affect the prospects for financial crises and, on the other hand, how the occurrence of financial crises shape the core elements of the financial system. We start by defining the financial crisis from three different perspectives. After it, we present the comprehensive history of financial crises that will allow us to continue by drawing some common patterns that are universal. Universal patterns in crises give us the ground for contemplating on some universal policy responses where we again follow different approaches. Taking into account the specifics of modern times and using the young and promising economy based on the blockchain, we are asking the question is this time different?. Analysis of initial development steps in the digital, trustless world gives us the basis for drawing parallels with the reality and the history. Our results suggest that there are many similarities throughout history and between the real and digital world. Instead of providing an exact answer on the question is this time different we conclude that there is a present strong feeling of Deja vu.
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