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Technological IT Course for Internal Education
Orlíček, Michal ; Ryšavý, Ondřej (referee) ; Pluskal, Jan (advisor)
The aim of this bachelor's thesis is to create a technological course on C# programming language for internal education. Prior to the creation of the course itself, the research of relevant study materials, presentation technologies, and development environments was done. From that research, it was possible to choose the appropriate length of the course, its language, the structure of suitable materials, and technologies which were used to create these materials. Additional documents, such as the study plan, the timetable, the annotations, the prerequisites, and the list of the acquired knowledge, are created as well. Last but not least, there are course materials themselves, which contains thirteen theoretical presentations suited for lectures and five practical exercises.
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A Tool for VoIP Audio Extraction
Ružička, Jakub ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
In this thesis, we describe VoIP protocols and design of a system to reconstruct audio data from VoIP communication. The system is able to detect VoIP packet streams in an IP network traffic and assemble an audio signal they carry. RTP and IAX VoIP protocols are supported. Unlike widespread RTP protocol, IAX is not fully supported by available tools although it is used by increasingly popular Asterisk communications project and offers interesting features not found in RTP. The system is implemented as a library with minimal frontend.
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Porting OpenVPN to Windows CE Platform
Ešner, Oldřich ; Ráb, Jaroslav (referee) ; Ryšavý, Ondřej (advisor)
The motivation for inception of this MSc. thesis which follows on from a term project of the same name was the transfer of the application for building private virtual OpenVPN networks from Windows XP operating system to Windows CE Embedded 6.0 platform. The project deals with virtual private networks in general and looks more closely at its implementation - OpenVPN. It also introduces the basic features of the Windows CE operating system. The project goes on to describe device drivers in NT-based Windows operating systems, the Windows Driver Model used, the NDIS network interface model and also the model of Windows CE drivers - the Stream Interface Model. The project continues with a~description of communication in OpenVPN application and primarily the role of TUN/TAP virtual network interfaces. This is followed by a proposal for transfer of TUN/TAP adapter drivers together with a description of limitations and necessary modifications between both platforms. As a result a TAP network device driver is implemented whose function is verified by test application that emulates the behaviour of a TUN adapter. The project concludes with an evaluation of the achieved results, the possibilities for further work on this theme and with the overall contribution of this project.
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Analysis and Detection of Multimedia Types in RTP Traffic
Kmeť, Martin ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This thesis deals with the issues of detecting the codec used for the encoding of voice data carried by the RTP protocol without having access to the information carried by signalisation protocols in VoIP applications. Its main goal is to create and implement a fast algorithm for detecting the codec used for voice transfer via the RTP protocol. This algorithm should be fast enough to be used for offline analysis of captured data as well as for real-time online analysis. For research of possibilities were compared two approaches of detection. Detection by the characteristics of the codecs was chosen to solve the problem itself. Within the solution was performed data analysis and implementation of the application followed by testing on data.
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Webmail Traffic Reconstruction
Slivka, Miroslav ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
Webmail applications are very popular these days. Besides typical usage, thanks to ciphered communication, they can be used for malicious activity like confidential data loss. This thesis discusses webmail events detection based on common webmail signatures in captured network traffic. Also there will be discussed SSL/TLS interception and decryption for further data analysis. The modules in this thesis are designed and implemented for Netfox.Framework forensics analysis tool. The Netfox project is developed at FIT BUT under security research project SEC6NET.
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Modelling and Reliability Analysis of Campus Network at the BUT
Kraus, Zdeněk ; Ryšavý, Ondřej (referee) ; Veselý, Vladimír (advisor)
This thesis informs about technologies and architecture of computer network at BUT. It describes chosen technologies and some of theirs variants. Further, it contains simulation model design of a network switch device. That is followed by the model implementation with detailed description of model parts. Then, the model is tested on a set of simulation scenarios and it is evaluated in comparison with theoretical basis and real devices. In conclusion, thesis suggests future model development and improvements.
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Modelling and Simulation of Network Design Guides for IP Routing
Rybová, Veronika ; Ryšavý, Ondřej (referee) ; Matoušek, Petr (advisor)
This bachelor's thesis describes simulation of network using tools Packet Tracer and OMNeT++. Models of network are created according to design guides by Cisco company, which use routing protocols RIP, OSPF and redistribution. In order to provide full functionality of models in OMNeT++ it is necessary to implement protocol RIP and redistribution from protocol OSPF to protocol RIP. Practical usage of tools is demonstrated by simulations of accessibility and stability of network. Thesis investigates results of simulations and usage of both tools for simulation of networks. We use design guides, which are destined to design of real networks, and implement protocol according to standard RFC, therefore we suppose that this thesis will have practical usage for analysis and simulation of company's and academical networks.
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Automation and Accounting of Coffee Machine
Víšek, Jakub ; Ryšavý, Ondřej (referee) ; Pluskal, Jan (advisor)
The goal of this thesis is to design and implement an embedded and information system for automatic accounting of coffee dispensed by a vending machine. Features of the created solution include reliability and portability. The system can be easily extended for use in point of sale applications different to coffee machines. The results enable easy deployment of electronic accounting of purchased products and demonstrate integration of a microcontroller which controls a coffee vending machine on the basis of identifying users by their RFID tags.
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Distributed Password Generation Using Probabilistic Grammars
Mikuš, Dávid ; Ryšavý, Ondřej (referee) ; Hranický, Radek (advisor)
This thesis describes a process of cracking a password, existing types of attacks and generating passwords using probabilistic grammar. This grammar can be used as an attack that works on the basis of learning from an existing list of passwords and generating them by using constructed context-free grammar from the learning phase. The core of this thesis is the design and implementation of distribution solution for this type of attack. Implementation includes refactoring of existing solution and optimization to maximize use of every available resource.
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