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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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BigData řešení pro zpracování rozsáhlých dat ze síťových toků / BigData Approach to Management of Large Netflow DatasetsMelkes, Miloslav January 2014 (has links)
This master‘s thesis focuses on distributed processing of big data from network communication. It begins with exploring network communication based on TCP/IP model with focus on data units on each layer, which is necessary to process during analyzation. In terms of the actual processing of big data is described programming model MapReduce, architecture of Apache Hadoop technology and it‘s usage for processing network flows on computer cluster. Second part of this thesis deals with design and following implementation of the application for processing network flows from network communication. In this part are discussed main and problematic parts from the actual implementation. After that this thesis ends with a comparison with available applications for network analysis and evaluation set of tests which confirmed linear growth of acceleration.
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Metody měření výkonnostních a kvalitativních parametrů datových sítí / Methods for measurement of data network performance and quality parametersSukup, Luboš January 2012 (has links)
Master thesis involves the development of quality measurement issues and performance parameters in data networks. It describes the main technologies as they affect the quality and performance parameters and the effect of these parameters for voice, video and data services. Next are listed some methods for measuring parameters of the data network.In the practical part is selected one method of measuring network parameters and properties of this method are demonstrated by illustrative examples.
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Laboratorní scénáře popisující systém DNS / Laboratory scenarios describing DNS systemSakala, Peter January 2018 (has links)
The master’s thesis deals with Domain Name System (DNS) and its practical use. It describes hierarchy of domain names, resource record types, protocol used, as well as DNSSEC extension. The most utilized implementations of authoritative and recursive DNS servers are presented. Virtualization, containers and other tools with potential use in labs are described. Two lab scenarios in virtualized environment with instructions for students were designed and developed in this thesis.
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Návrh paketového analyzátoru pro bezdrátové senzorové sítě založené na standardu IEEE 802.15.4 / Packet analyser for a Wireless Sensor Networks based on the standard IEEE 802.15.4Bednařík, Martin January 2011 (has links)
The objective of this thesis is to get familiar with wireless sensor networks technologies and with standard IEEE 802.15.4. and communication principle in wireless sensor networks built on this standard. Main goal of this project is to design a packet analyzer, which is capable to catch data on chosen channel and this data is able to analyze. Part of this project is production of necessary microcontroller software equipment. Another output of this project is do a research of available packet analyzers on market and compare them with analyzer build by this thesis.
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Návrh ovladače pro PROFINET bus coupler / Driver design for PROFINET bus couplerKroupa, Jiří January 2015 (has links)
The essence of this diploma thesis is the design and implementation of driver for Profinet bus coupler from Phoenix Contact, which use computer's network card for communication. The proposal builds on the knowledge gained from available literature and analysis of Profinet protocol.
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Metody měření výkonnostních a kvalitativních parametrů datových sítí / Methods for measurement of data network performance and quality parametersSukup, Luboš January 2013 (has links)
Master thesis involves the development of quality measurement issues and performance parameters in data networks. It describes the main technologies as they affect the quality and performance parameters and the effect of these parameters for voice, video and data services. Next are listed some methods for measuring parameters of the data network.In the practical part is selected one method of measuring network parameters and properties of this method are demonstrated by illustrative examples.
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Simulation of industrial control system field devices for cyber securityAndersson, Dorothea January 2017 (has links)
Industrial Control Systems (ICS) are an integral part of modernsociety, not least when it comes to controlling and protecting criticalinfrastructure such as power grids and water supply. There is a need to testthese systems for vulnerabilities, but it is often difficult if not impossible to doso in operational real time systems since they have been shown to be sensitiveeven to disturbances caused by benign diagnostic tools. This thesis exploreshow ICS field devices can be simulated in order to fool potential antagonists,and how they can be used in virtualized ICS for cyber security research. 8different field devices were simulated using the honeypot daemon Honeyd,and a generally applicable simulation methodology was developed. It was alsoexplored how these simulations can be further developed in order to functionlike real field devices in virtualized environments. / Industriella informations- och styrsystem utgör en viktig delav vårt moderna samhälle, inte minst när det gäller kontroll och skydd avkritisk infrastruktur som elnät och vattenförsörjning. Det finns stora behov avatt säkerhetstesta dessa typer av system, vilket ofta är omöjligt iproduktionsmiljöer med realtidskrav som är erkänt känsliga för störningar, tilloch med från vanligt förekommande analysverktyg. Denna rapport presenterarhur vanliga komponenter i industriella informations- och styrsystem kansimuleras för att lura potentiella antagonister, och hur de kan användas ivirtualiserade styrsystem för cybersäkerhetsforskning. 8 olika komponentersimulerades med hjälp av Honeyd, och en generellt applicerbarsimuleringsmetodik utvecklades. Hur dessa simuleringar kan vidareutvecklasför att fungera som riktiga styrsystemskomponenter i virtualiserade miljöer harockså undersökts.
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Är det någon som gräver efter krypto på min dator? : En studie kring hotet av kryptobrytningSkåås, Filippa, Olsson, Karin January 2023 (has links)
Kryptobrytning är den processen där transaktioner kryptovaluta verifieras.Idag är olaglig kryptobrytning ett stort hot då det utgör en stor del avorganiserad brottslighet. Dessutom kan skadliga kryptobrytningsprogramförkorta en dators livslängd avsevärt. Program som används tillkryptobrytning drar även stora mängder processorkraft, vilket kan göra att endator börjar arbeta långsamt. För att detektera program på en dator går det attta till olika metoder.Syftet med arbetet är att undersöka om det går att identifiera kryptobrytningmed hjälp av verktyg som kan analysera paket som skickas över nätverk frånett kryptobrytningsprogram. Samtidigt observeras det vilka varianter avartefakter som kan urskiljas och vilka andra typer av metoder det finns atttillgå vid detektion av kryptobrytning.Resultatet visar att enbart specifika typer av kryptobrytningsattacker kanupptäckas med paketanalysatorer och systemverktyg eftersom en hackarekan, i de flesta fall, förbipassera verktygen. Däremot visar i de flesta fallresultatet att det finns nackdelar respektive fördelar med varje metod. Detmest effektiva sättet för att skydda privata tillgångar och publikaorganisationers resurser är att använda en flerskiktsstrategi genom attkombinera alla typer av metoder. Ett antal av de artefakter som hittades somkan vara till användning var IP adresser, MAC-adresser, geolokalisering ochmetadata. / Today, illegal crypto mining poses a significant threat because it plays a bigrole in organized crime. In addition, it can shorten the lifespan significantly.Programs dedicated to crypto mining also consume substantial amounts ofprocessing power, which can slow down a computer. Various methods can beemployed to detect such programs on a computer.The purpose of this work is to investigate whether it is possible to identifycrypto mining using tools that can analyze packets transmitted over thenetwork from a crypto mining program. Additionally, it is observed whichvariants of artifacts can be distinguished and what other types of methods areavailable for detecting crypto mining.The result shows that only specific types of crypto mining attacks can bedetected using packet analyzers and system tools, as a hacker can bypass thesetools in most cases. However, the result also indicates that there aredisadvantages and advantages to each method. The most effective way toprotect your assets and organizational resources is to use a multi-layeredstrategy by combining all types of methods. Some of the artifacts found thatmay be useful include IP addresses, MAC addresses, geolocation, andmetadata.
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Functional and Security Testing of a Mobile Client-Server Application / Funktionell och säkerhetstestning av en mobilapplikation bestående av en klient- och serversidaHolmberg, Daniel, Nyberg, Victor January 2018 (has links)
Today’s massive usage of smartphones has put a high demand on all application developers in the matter of security. For us to be able to keep using all existing and new applications, a process that removes significant security vulnerabilities is essential. To remove these vulnerabilities, the applications have to be tested. In this thesis, we identify six methods for functional and security testing of client-server applications running Android and Python Flask. Regarding functional testing, we implement Espresso testing and RESTful API testing. In regards to the security testing of the system, we do not only implement fuzz testing, sniffing, reverse engineering and SQL injection testing on a system developed by a student group in a parallel project, but also discover a significant security vulnerability that directly affects the integrity and reliability of this system. Out of the six identified testing techniques, reverse engineering exposed the vulnerability. In conjunction with this, we verified that the system’s functionality works as it is supposed to.
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IMPLEMENTING NETCONF AND YANG ON CUSTOM EMBEDDED SYSTEMSGeorges, Krister, Jahnstedt, Per January 2023 (has links)
Simple Network Management Protocol (SNMP) has been the traditional approach for configuring and monitoring network devices, but its limitations in security and automation have driven the exploration of alternative solutions. The Network Configuration Protocol (NETCONF) and Yet Another Next Generation (YANG) data modeling language significantly improve security and automation capabilities. This thesis aims to investigate the feasibility of implementing a NETCONF server on the Anybus CompactCom (ABCC) Industrial Internet of Things (IIoT) Security module, an embedded device with limited processing power and memory, running on a custom operating system, and using open source projects with MbedTLS as the cryptographic primitive library. The project will assess implementing a YANG model to describe the ABCC’s configurable interface, connecting with a NETCONF client to exchange capabilities, monitoring specific attributes or interfaces on the device, and invoking remote procedure call (RPC) commands to configure the ABCC settings. The goal is to provide a proof of concept and contribute to the growing trend of adopting NETCONF and YANG in the industry, particularly for the Industrial Internet of Things (IIoT) platform of Hardware Meets Software (HMS).
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