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Quantum and Post-quantum Cryptography
Krivulčík, Andrej ; Ricci, Sara (referee) ; Hajný, Jan (advisor)
S pokrokom v rozvoji kvantových počítačov prichádza hrozba prelomenia algoritmov ktoré sa používajú pri bežnej komunikácii. S týmto vzniklo odvetvie pre post-kvantovú kryptografiu ktoré vyvíja algoritmy odolné voči kvantovým počítačom. Cieľom tejto diplomovej práce naštudovanie metód pre kombináciu a využitie kľúčov ustanovených pomocou kvantových a post-kvantových algoritmov takým spôsobom, keby pri došlo k prelomeniu jedného z daných algoritmov tak výsledný hybridný klúč bude stále bezpečný. Výsledný klúč je následne využitý pri šifrovaní súboru pomocou AES--256 ktorý je zaslaný medzi klientami.
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Effective random number generator for limited devices
Michálek, Tomáš ; Mlýnek, Petr (referee) ; Fujdiak, Radek (advisor)
This thesis solves the problem of generating random numbers on low-power devices. Author describes possible ways of generating and implements selected generators of (pseudo)random numbers on MSP430F5438A. 4 generators were added by the enhancement of one of them and a new generator was created, using the phenomenon of temperature change in the surroundings. For each generator, test sequences were generated and these sequences were tested by the Dieharder, STS-NIST, and Visual Test. The output of the thesis is the functional implementation of the generators, their testing by statistical methods and their comparison between each other.
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Evaluation of entropy sources in common computers
Bafrnec, Matúš ; Zeman, Václav (referee) ; Burda, Karel (advisor)
This thesis is focused on entropy sources and their evaluation. It includes a brief introduction to the information theory, description of entropy sources, their parameters and characteristics and methods of evaluation based on the NIST organisation standard SP 800-90B. The following part of the thesis is dedicated to the description of two created programs and evaluation and comparison of entropy sources. Additionally, the last part describes the usage of hash functions in association with entropy sources.
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Recognition of Handwritten Digits
Hekrdla, Michal ; Hradiš, Michal (referee) ; Herout, Adam (advisor)
This bachelors thesis inspects an issue of recognition of handwritten digits with decision trees method. It describes principle method, usage database NITS (National Institute of Standards and Technology) for purposes teaching algorithm, construction tags tree and decision tree. It describes too implementation those method on demonstrational program, which is its programme part. Finally it deal with testing recognition program and its estimation.
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Entropic generator of random numbers
Kolář, Michal ; Číž, Radim (referee) ; Burda, Karel (advisor)
This paper is focused on generating random number via entropy generators. There are described sources of entropy on personal computer and described methods of detecting their entropy. There are also described basic operations used for construction and for concept solution this generator under NIST recommendation for personal computer and methods of their testing.
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Software library of basic symmetric and asymmetric primitives of modern cryptography on embedded platforms
Miška, Matěj ; Mlýnek, Petr (referee) ; Lieskovan, Tomáš (advisor)
This master thesis deals with a search of cryptographic primitives for embedded systems, which are tested on Raspberry Pi platforms and the results compared in the subsequent practical part. The content of the research is an explanation of the use of cryptography in information systems, an example of a protocol using cryptography in the energy sector, the selection of cryptographic primitives based on recommendations from security institutions, a description of Raspberry Pi embedded platforms and an introduction of cryptographic libraries providing tools to perform cryptographic operations. The theoretical part of the thesis results in an overview of the information needed to create a test tool. The subsequent practical part deals with the theoretical design of the required tool, the determination of the functions that the tool must have and the way of performing the testing. This is followed by a description of the choice of the programming language and development environment suitable for this work, together with a description of the internal structure of the developed application. The testing parameters are mainly the computational, memory and time requirements of the cryptographic primitives on the system. The paper concludes with methods of running and controlling the application, possible presentation of the measured results, the actual results of testing the selected embedded platforms and a discussion of these results.
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Random number generator based on noise for low-power devices
Ecler, Tomáš ; Fujdiak, Radek (referee) ; Mlýnek, Petr (advisor)
The bachelor thesis deals with the design of a hardware generator of random numbers using a low-power microcontroller MSP430. At first are described the existing methods of generating random numbers and comparison of different types generators. After that are stated the batteries of statistical tests which can be verified the generator on the basis of generated sequence. In the end of the thesis is to verify own proposals of the generator by using the statistical tests NIST.
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Case Study of Selected Network Vulnerabilities
Kolajová, Jana ; Kačic, Matej (referee) ; Homoliak, Ivan (advisor)
The main goal of this thesis is to deal with databases of vulnerable code bases and vulnerable applications, and to implement a tool for autonomous search and saving data from those databases to a local one. The thesis is divided into theoretical and practical parts. The theoretical part deals with my current knowledge of the main topic and creates a foundation for the implementation. Various kinds of vulnerabilities and network attacks are described in detail in this part. The practical part describes implementation of the tool and its real use.
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Web application for testing web server vulnerabilities
Šnajdr, Václav ; Burda, Karel (referee) ; Smékal, David (advisor)
The Master’s Thesis deals with the design and implementation of a web application for testing the security of SSL/TLS protocols on a remote server. The web application is developed in the Nette framework. The theoretical part describes SSL/TLS protocols, vulnerabilities, recommendations and technologies used in the practical part. The practical part is devoted to the creation of a web application with the process of using automatic scripts to test and display the results on the website with a rating of A+~to~C. The web application also displays a list of detected vulnerabilities and their recommendations.
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Case Study of Selected Network Vulnerabilities
Kolajová, Jana ; Malinka, Kamil (referee) ; Homoliak, Ivan (advisor)
The main goal of this thesis is to deal with databases of vulnerable code bases and vulnerable applications, and to implement a tool for autonomous search and saving data from those databases to a local one. The thesis is divided into theoretical and practical parts. The theoretical part deals with my current knowledge of the main topic and creates a foundation for the implementation. Various kinds of vulnerabilities and network attacks are described in detail in this part. The practical part describes implementation of the tool and its real use.
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