Les informations relatives aux cryptomonnaies sont susceptibles de changer à l'avenir tant cette matière est nouvelle et encore peu ancrée dans le droit. Ce mémoire est une réflexion sur l'essor du Bitcoin et des cryptomonnaies à leurs débuts, alors même que le droit cherche à s'accaparer ces nouvelles technologies, à les intégrer dans son système préexistant. / Les cryptomonnaies sont des monnaies numériques, qui se sont développées hors de tout contrôle étatique et qui fonctionnent de manière décentralisée. Bien qu’étant encore à leurs balbutiements, ces cryptomonnaies, à l’instar du Bitcoin, soulèvent de nombreuses questions juridiques. Dans ce mémoire, seront analysées les différentes définitions qui pourraient inclure la cryptomonnaie, avant de nous concentrer sur la définition de la monnaie numérique. Ensuite, seront étudiés, les aspects criminogènes des cryptomonnaies et la volonté des États d’avoir un certain contrôle sur celles-ci. Puis après nous être concentré sur la fiscalité applicable aux monnaies numériques, il sera nécessaire d’examiner l’étendue de la protection des consommateurs, dans leurs rapports aux cryptomonnaies. Pour ce faire nous nous appuierons, entre autre, sur les lois canadiennes, françaises et américaines. Toutefois vous vous en rendrez-compte, les cryptomonnaies n’ont pas encore été totalement englobés dans les systèmes juridiques des trois pays étudiés, et les tribunaux n’ont été saisis que dans très peu d’affaires relatives aux monnaies numériques, ce qui implique que de nombreuses incertitudes juridiques persistent à l’heure actuelle. / Cryptocurrencies are digital currencies which developped outside of state control. They function in a purely decentralized manner. Although they are only at an early stage, those cryptocurrencies, like Bitcoin, raise many legal issues. In this article we will analyze different definitions which might include cryptocurrencies, before focusing on the definition of digital currencies. Therefore we will study the criminal aspects of cryptocurrencies and the willingness of the states to gain a certain control over them. Then, after focusing on the taxes applying to digital currencies, it is necessary to examine the extent of the consumer’s protection while dealing with cryptocurrencies. In order to do this, we will rely, among others, on Canadian, French and American laws. As you will notice by yourselves the cryptocurrencies have not yet been fully encompassed within the legal systems of those three countries, and as the courts have only been seized in very few cases relating to digital currencies, you will find that many legal uncertainties currently persist.

Topic: Legal Regulation of Payment Transactions Author: Bc. Pavel Martiník Supervisor: JUDr. Petr Kotáb, Ph.D. Regulation of payment services plays a key role in this era driven by escalating digitalization. The aim of this Thesis is to depict current challenges that this area of financial law faces and to propose a basis for regulation that can be implemented in the Czech Republic. The main topic of this Thesis is virtual currencies, more specifically Bitcoins and their status within the system of payment services regulations. After a short introduction, the first chapter of this Thesis describes theoretical background of payment services regulation, especially general and specific aims of legislation in this area of financial law, by addressing it in full context of private and public law. Besides that, it also briefly illustrates the history of payment services and money. The next chapter deals with current regulation that has been adopted in the Czech Republic. Besides virtual currencies, electronic money is discussed in full detail due to its similar features with virtual currencies. Furthermore, foreign regulation of payment systems is briefly described in order to provide a comparison with the Czech Republic. Therefore, both Czech and foreign regulations dealing with virtual currencies that...

The main aim of this diploma thesis is to find out how the Czech printed media face relatively new and complex phenomenon that emerged in the monetary sphere - virtual currency bitcoin. Through the means of quantitative content analysis, all printed titles showing relevant references to bitcoin between the years 2009 and 2016 were examined. The thesis is divided into several chapters. The theoretical part contains different media concepts dealing with the agenda-setting, the creation of a media portrayal and the construction of social reality through mass media. From a theoretical point of view, the cryptocurrency bitcoin was also subject for detailed analysis. The following methodological part of the thesis introduces the main objective of research, research questions and research design. The analytical part provides a clear overview of the results obtained, then interpreted and compared with predetermined hypothesis. The overview of collected findings about the media image of the virtual currency bitcoin in the Czech press are summarized in the conclusion. The thesis is the first paper to deal with the issues of the virtual currency bitcoin from the point of view of media discourse in the Czech Republic, and its ambition was to gather completely new information on this topic.

Virtual currencies and mobile banking are technology advancements that are receiving increased attention in the global community because of their accessibility, convenience and speed. However, this popularity comes with growing security concerns, like increasing frequency of identity theft, leading to bigger problems which put user anonymity at risk. One possible solution for these problems is using cryptography to enhance security of Bitcoin or other decentralised digital currency systems and to decrease frequency of attacks on either communication channels or system storage. This report outlines various methods and solutions targeting these issues and aims to understand their effectiveness. It also describes Secure Bitcoin Wallet, standard Bitcoin transactions client, enhanced with various security features and services.

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