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Processing of the Blockchain Employing IPFS
Múčka, Matúš ; Lichtner, Ondrej (oponent) ; Veselý, Vladimír (vedoucí práce)
This work aims to design a platform for processing blockchain data of selected cryptocurrencies for further exploring using IPFS. In this thesis, we created a proprietary decentralized and distributed database system that supports advanced queries. The solution provides a well-arranged graphical user interface for data visualization as well as API, which makes it easy to connect to other applications. The benefit of this work is a new view of blockchain processing which opens up new possibilities in its exploring.
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Control of External Devices on macOS to Prevent Data Leaks
Zuzelka, Jozef ; Veselý, Vladimír (oponent) ; Pluskal, Jan (vedoucí práce)
This thesis is aimed at managing and blocking of external devices in Apple macOS operating system to prevent leaks of sensitive data. The implemented solution presents a chosen approach for blocking external drives and selected cloud drives. The project uses the DiskArbitration framework to block external devices, as it is the most suitable approach for this type of task. However, cloud drives are in reality just synchronized folders, therefore Endpoint Security framework had to be utilized to achieve an adequate level of control. Currently supported cloud providers are iCloud and Dropbox, and access to them can be restricted either entirely or to read-only. The ability to synchronize remote changes was preserved; however, in the case of Dropbox, its GUI cannot be used to edit files.
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The System for Collection and Analysis of Cryptocurrency Exchange Rates
Čaládi, Filip ; Pluskal, Jan (oponent) ; Veselý, Vladimír (vedoucí práce)
This Bachelor's thesis is focused on cryptocurrencies, cryptocurrency exchanges and pricing principles on each of them. The goal of this project is to collect actual and historical data about cryptocurrency and Fiat money exchange rates from available resources. The data are collected and transformed into a structured database at regular intervals with a focus on effectivity and memory management. The proposed system which is capable of gathering such data is providing all collected information in the form of REST API or web application and deployed in Docker container image. The system validity is tested with performance measurement of the data-collecting subsystem and implementing several unit-tests for each part of the system.
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Cryptocurrency Node Monitoring
Zaujec, Andrej ; Grégr, Matěj (oponent) ; Veselý, Vladimír (vedoucí práce)
The goal of this bachelor thesis is to monitor nodes in the Bitcoin peer-to-peer network and to estimate the size of the network in a given time. Monitoring of nodes includes gathering metadata about them and creating activity records about how long they are participating in the network. The proposed solution uses the Bitcoin Core client without any modification to obtain all information about the network and nodes. The implemented platform enables gathering metadata (protocol version, user agent, services, IP address, port number) about found nodes. It obtains information about which nodes are in the network for the given time as well. Created API exposes collected data from the platform. Docker containers encapsulate each component of the platform and enable simple deployment within a few minutes.
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Rest API for Bitcoin Network Querying
Žigo, Tomáš ; Veselý, Vladimír (oponent) ; Pluskal, Jan (vedoucí práce)
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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Cisco Command Line Support in Highlight.js
Mateáš, Branislav ; Veselý, Vladimír (oponent) ; Polčák, Libor (vedoucí práce)
The aim of the work was to create a tool to support users of Cisco devices. Support is based on color-coded command syntax. The result of the work is a tool for off-line browsing of web pages containing Cisco commands and configuration statements with color resolution of keywords, IP addresses, numbers, strings, domains, network paths, etc. When creating the utility for Cisco users, current information technologies were used as regular expressions, which are used in the JavaScript programming language used, and the color highlighting itself is solved as an extension of the Highlight.js tool. The proposed grammar was published on the official website of the Highlight.js internet community, where it can be accessed by all interested future users. Part of the work is also testing the proposed tool on computers of different configurations in the three most used Internet browsers.
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Hardware For Ultrasonic Anemometer
Veselý, Vladan
The article describes the development of hardware for a low cost ultrasonic anemometer. The core of the device is a STM32F103CBT6 processor, a part of the Maple Mini development platform. In addition to ultrasonic measurement circuits, meteorological sensors and communication circuits are also connected to the processor. The paper also discusses various methods to excite ultrasonic transducers and to process the received signal; the latter procedure embodies the basis of the designed instrument. All the electronic components are embedded in a self-heating plastic case. The sensor satisfies all relevant safety and weather resistance requirements.
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Analytické webové prostředí pro zpracování zachycené síťové komunikace
Ambrož, Tomáš ; Veselý, Vladimír (oponent) ; Pluskal, Jan (vedoucí práce)
V současnosti probíhá velká část komunikace skrze počítačové sítě. Objem této komunikace se každým rokem zvětšuje. To má za následek, že se zvyšují i nároky na výpočetní výkon. Za účelem zvýšení výpočetního výkonu se vyplatí proces zpracování komunikace pro forenzní účely paralelizovat. Výzkumná skupina NES@FIT v jednom ze svých projektů vytvořila nástroj Netfox Detective. Z tohoto nástroje je v plánu vytvořit distribuovaný systém pro zpracování zachycené komunikace za účelem forenzní analýzy. Jednou z částí je rozhraní, pomocí kterého by se distribuovaný systém ovládal. V této diplomové práci se budu zabývat tvorbou webového rozhraní pro nástroj Netfox Detective, který je v současné době desktopovou aplikací. Webové rozhraní by se poté dalo po drobnějších úpravách použít pro paralelizovanou variantu aplikace. Webové rozhraní bude zprostředkovávat stejné informace jako desktopová varianta. Pro získání informací pro forenzní analýzu bude využívat stejně jako desktopová varianta framework Netfox Framework. Výhoda webového rozhraní oproti desktopové variantě uživatelského rozhraní je v tom, že uživateli k tomu, aby mohl přistoupit k webovému rozhraní, postačuje zařízení s webovým prohlížečem. Což znamená, že uživatel může pracovat na jakémkoliv operačním systému.
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Framework for Captured Network Communication Processing
Pluskal, Jan ; Veselý, Vladimír (oponent) ; Ryšavý, Ondřej (vedoucí práce)
This thesis discusses network forensic data analysis possibilities, together with data mining methods to extract data from an intercepted communication. Applicability of commonly available (open-source and proprietary) tools and whole frameworks is evaluated and basic requirements for complex analysis tool are stated based on that review. Using experiences gained in the past experimentation with prototypes, functionally related components were designed based on a Divide and Conquer methodology. Components were implemented as autonomous modules that are able to cooperate each one with another. By committing series of tests some deficiencies were identified in processing of non-standard data captures that were fixed by improvement of reconstruction algorithms. The basic functionality of individual components are validated using UnitTests with more then major code coverage. Finally, the performance of capture processing was benchmarked and compared to similar oriented tools.
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Analýza a rekonstrukce webového provozu
Olbert, Jakub ; Ryšavý, Ondřej (oponent) ; Veselý, Vladimír (vedoucí práce)
Práce popisuje problematiku rekonstrukce a analýzy webového provozu. Hlavním cílem je nastudování teoretické roviny této oblasti a vytvoření návrhu rekonstrukčního nástroje, jehož implementace je předmětem diplomové práce. Nástroj na základě odposlechnutých síťových dat rekonstruuje webový provoz tak, aby mohl být zpětně vizualizován. Využití se předpokládá u bezpečnostních složek státu zabývajících se internetovou kriminalitou.
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