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Portal of the universal access control protocol
Čepelák, Tomáš ; Ležák, Petr (referee) ; Burda, Karel (advisor)
The paper focuses on the issue of access control. It presents an universal bilateral protocol of access control of ACP. The paper describes the messages and its sequences that AC portals uses for communication. It describes the functions and features of the modules from which the portal is composed. The paper suggests the concept of a modular AC portal solutions including the design of basic modules. It also outlines possible test scenarios. Under this proposal is generated functional AC portal on the .NET Framework platform using the C\# programming language. The portal provides access to local assets or to the assets on other computers in the local network. Created application is tested according to the scenarios proposed in both the network version and the local version of the AC portal. Test results are objectively evaluated and commented.
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USB miltimeter with microprocessor
Samek, Martin ; Kolka, Zdeněk (referee) ; Kovář, Jan (advisor)
Topic of my terminal labour is a proposion of multimeter and its resulting connection by the help of bus USB. When proposing the multimeter there was a tendency to use a minimal number of component parts to conserve a good protection against a bad usage in application. The most widespread busbar USB is used for connection of the multimeter and a computer. Standard HID is used for communication, for that it is not neccessary to install any system drivers.
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Server application to process data from a MySQL database and their interpretation
Gardian, Ján ; Zeman, Kryštof (referee) ; Červenák, Rastislav (advisor)
Diploma thesis is about creating server application that process and interprets data from the database. Main aim of such application is able to process a large number of database requests in real-time environment. Provided database contains records of measuring download speed and quality of mobile connection via different radio technology from various providers. Those measured data are sent from users all around the world and amount of data collected is still growing. Therefore created server application can adapt to increasing size of database thanks to aggregation. This method of aggregation and use of index in database tables are further discussed in the theoretical part. Mainly putting indexes in tables produce significant acceleration of processing database requests. Final product of this thesis is an application that consist of three components: a server application running aggregation, website that interprets measured data and back-end interface providing measured data as well. Data at the website are presented in form of graphs for different countries and used radio technologies. Web address and user manual for finished applications are provided in the fourth chapter of diploma thesis. In the last part of thesis are performed various speed tests of programmed application that confirm the effectiveness of selected and described methods to accelerate work with the database.
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Bitcoin Mining Acceleration
Novotný, Jan ; Veselý, Vladimír (referee) ; Kajan, Michal (advisor)
This master's thesis deals with virtual currency called Bitcoin. It describes the functioning of the currency of technical perspective especially the implementation of the transaction, the way of its validation and ensuring the integrity by using cryptographic functions. Furthermore, it describes the principle of the Bitcoin creation, particularly mining method called pooled mining. The thesis also describes the communication protocols and design of architecture to acceleration of the bitcoin mining. Finally, there are described tests, assessment and proposals for the continuation of work.
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Identification of Cryptocurrency Users
Zrnčík, Henrich ; Matoušek, Petr (referee) ; Veselý, Vladimír (advisor)
abstract.en={The 3rd January 2009 is considered to be the beginning of the cryptocurrency era. This work will deal with one of the ways of obtaining information about cryptocurrency users. It will be done by retrieving it from public websites where users often knowingly or unknowingly publish their cryptocurrency's address for different purposes (donation accounts or online payments which include personal data) as a result of which it is possible to link their crypto account with their real identity. The information is obtained through web scrappings. The result is an implemented application capable of automated collecting of data about the identity of cryptocurrency users and its subsequent storage in a structured database.
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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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Rest API for Bitcoin Network Querying
Žigo, Tomáš ; Veselý, Vladimír (referee) ; Pluskal, Jan (advisor)
This bachelor's thesis solves issues of Bitcoin network transformed data processing. The main aim of this thesis is to describe the details of Bitcoin network cryptocurrency principles and subsequently create an application which is able to process and allow access to historical data as well as actual data in the network. The solution was focused on fast synchronization and the ability to respond to requests in the shortest possible time. The problem was implemented using the NoSQL database system Cassandra with database import strategy where some data fields are updated only on request. Created solution is mostly able to compete with currently available tools.
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Security and Performance Analysis of Avalanche Distributed Consensus Protocol
Sapák, Filip ; Malinka, Kamil (referee) ; Perešíni, Martin (advisor)
V tejto práci sme sa zaoberali analýzou "Proof-of-Stake (PoS) distribuovaného konsenzuálneho protokolu Avalanche, problematikou blockchainu, konsenzuálnych algoritmov a simulačnými nástrojmi určenými na simuláciu blockchainu. Po oboznámení sa so všetkými potrebnými skutočnosťami, práca pokračuje implementáciou simulátora konsenzuálneho algoritmu implementovaného v protokole Avalanche, ktorý napodobňuje fungovanie Avalanche konsenzu. Experimenty so simulátorom boli vykonané s rôznymi parametrami a pomohli nám pochopiť vlastnosti Avalanche.
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Non-competition clause in M&A transactions from the perspective of Competition Law
Pavlík, Filip ; Patěk, Daniel (advisor) ; Pelikán, Robert (referee)
The presented thesis with a title "Non-competition clauses in M&A transactions from the perspective of Competition Law" aims to comprehensively analyse the question of conclusion of non-competition clauses with emphasis on the context of M&A transactions and the reasons for their conclusion. The main contribution of this thesis is to provide a comprehensive overview of the conditions of validity of non-competition clauses when these are observed, it is possible to consider the non-competition clause as agreed between the parties of the relevant M&A transaction as justified and proportionate, with a minimum risk of such clause being revoked. In the first chapter, I am dealing with the concept of M&A transactions, individual types of M&A transactions and their division. At the end of this chapter, the importance of the non- competition clauses is outlined with reasons why they are concluded within M&A transactions. In the second chapter, I have focused on the general characteristics of competition and prohibition of competition. This chapter also deals with the non-competition clauses themselves in M&A transactions and the adjustment of these clauses in accordance with the Commission Notice on restrictions directly related and necessary to concentrations (2005/C 56/03). The third chapter deals with...
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Non-competition clause in M&A transactions from the perspecitve of Competiton Law
Pavlík, Filip ; Patěk, Daniel (advisor) ; Pelikán, Robert (referee)
The presented thesis with a title "Non-competition clauses in M&A transactions from the perspective of Competition Law" aims to comprehensively analyse the content and the question of conclusion of non-competition clauses with emphasis on the context of M&A transactions and the reasons for their conclusion. The main contribution of this thesis is to provide a comprehensive overview of the conditions of validity of non-competition clauses when these are observed, it is possible to consider the non-competition clause as agreed between the parties of the relevant M&A transaction as justified and proportionate, with a minimum risk of such clause being revoked and also provide a practical perspective on the matter of their negotiation based on an analysis of a representative sample of completed transactions. In the first chapter, first, I am briefly dealing with the general definition of competition, and subsequently with the concept of non-competition clause, its impact on competition and where it can be found in practice. The second chapter deals with a summary of the most important European and Czech legal regulation on non-competition clauses and Commission soft-law. In chapter three, I am dealing with the concept of M&A transactions, the reasons for making them and their division. In the second...
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