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Electronic Registry for Local Authority
Stránský, Karel ; Burget, Radek (referee) ; Rychlý, Marek (advisor)
Bachelor thesis "Electronic registry for local authority" is focused on usage of electronic registries for electronic communication between citizens and public authority. The first part describes the legislative page incidental with e-registries, principles of their functionality, and important requierements which are set on e-registiries. Furthermore elementary electronic signature's informations are included, along with creation and verification, and informations about certificates and certification authorities. The usage of digital signature at communication with electronic registry is also described. The second part is used to present particular concept of implemented sample electronic registry's system, and the solution of picked problems.
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System for Loging Changes in Operating System
Pečeňa, Jan ; Smrčka, Aleš (referee) ; Peringer, Petr (advisor)
Bachelor's thesis describes the design and implementation of applications for the detection of changes in the operating system. Window´s registry, registry key, subkey and value are explained in introductory part. Hash function needed to identify the changed files is explained too. The created application is fully functional and works with 32 and 64 bit versions of Windows. Actual state is saved in the first run. Changes in operating system are detected in the second run. Operating system is installed in a VMWare virtual machine.
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Hash functions and their usage in user authentication
Piller, Igor ; Stančík, Peter (referee) ; Hajný, Jan (advisor)
This thesis concerns with hash functions and their usage in authentication. It presents basics of hash functions theory and construction elements. In particular the thesis focuses on LMHash, MD4, MD5 and SHA family hash functions, which are compared from the security point of view. The thesis describes in general the most frequently used hash function attacks, points out the weaknesses of current construction and mentions the future perspective of hash functions. Furthermore the thesis outlines the area authentication and describes usage of hash functions in the area. Practical part of the thesis contains an implements of a general authentication framework implemented in programming language C#. The result is client and server applications, in which two selected authentication methods were successfully tested. The result implementation is flexible with respect to the possible future use of other authentication methods.
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Password Recovery in Distributed Environment
Kos, Ondřej ; Veselý, Vladimír (referee) ; Hranický, Radek (advisor)
The goal of this thesis is to design and implement a framework allowing password recovery in a distributed environment. The research is therefore focused on analyzing the security of passwords, techniques used for attacks on them and also presents methods preventing attacks on passwords. Described is the Wrathion tool which is allowing password recovery using acceleration on graphic cards through the integration of OpenCL framework. Conducted is also an analysis of available environments providing means to run computing tasks on multiple devices, based on which the OpenMPI platform is chosen for extending Wrathion. Disclosed are various modifications and added components, and the entire system is also subjected to experiments aiming at the measuring of scalability and network traffic performance. The financial side of the use of Wrathion tool is also discussed in terms of its usability in cloud based distributed environment.
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Safe Cryptography Algorithms
Mahdal, Jakub ; Hanáček, Petr (referee) ; Chmelař, Petr (advisor)
This thesis brings a reader an overview about historical and modern world of cryptographic methods, as well evaluates actual state of cryptographic algorithm progressions, which are used in applications nowadays. The aim of the work describes common symmetric, asymmetric encryption methods, cryptographic hash functions and as well pseudorandom number generators, authentication protocols and protocols for building VPNs. This document also shows the basics of the successful modern cryptanalysis and reveals algorithms that shouldn't be used and which algorithms are vulnerable. The reader will be also recommended an overview of cryptographic algorithms that are expected to stay safe in the future.
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Electronic money
Gescheidt, Daniel ; Komosný, Dan (referee) ; Zeman, Václav (advisor)
In this bachelor thesis are described electronic money systems, which uses cryptography techniques such as symmetric and asymmetric ciphers, digital sign and hash function. Describing those techniques is crucial for understanding how electronic money systems works. Then three electronic money systems from Czech republic are briefly described.
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Design of security infrastructure for electronic archive
Doležel, Radek ; Lattenberg, Ivo (referee) ; Zeman, Václav (advisor)
This master's thesis deals with design of security infrastructure for electronic archive. In theoretical part is disscus about technical resources which are based on security services and protocols and methods which are used for protection. On basics of theoretical part is designed model of security infrastructure and it is built in laboratory. Model of security infrastructure is based on Open Source Software and as safety storages for private user authentication data are used cryptographic USB tokens. This master's thesis includes design and construction of real infrastructure of secured electronic archive. In each part of master's thesis is put main emphases on security and clear explanation from the beginning of desing of model of security infrastructure for electronic archive to finish of construction.
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Bloom Filters and Their Properties
Prokop, Tomáš ; Kajan, Michal (referee) ; Puš, Viktor (advisor)
A dissertation is engaged in a description and a construction of the Bloom filter. The inventor of this filter is Burton H. Bloom. The Bloom filter represents an efficient tool for storing elements into the universal aggregate in the form of a data structure. It processes large volume of data while filling less of store space. The data structure makes it possible to insert elements and their time after time selecting in the aggregate with zero probability of errors. Part of the dissertation is explanation of properties and usage methods of the data structure including possibility of a reduction acceptable errors. An expansion of the Bloom filter is computed Bloom filter, which allows broader usage of the data structure.
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Authentication Using Lightweight Cryptography
Člupek, Vlastimil ; Uchytil, Stanislav (referee) ; Dostál, Otto (referee) ; Zeman, Václav (advisor)
The dissertation thesis deals with cryptographic protocols for secure authentication of communicating parties, which are intended primarily for low-cost devices used in Internet of Things. Low-cost devices represent computationally, memory and power constrained devices. The thesis focuses mainly on the possibilities of using mathematically undemanding cryptographic resorces for ensuring integrity of transmitted dat, authenticity of and secured transmission of data on low-cost devices. The main goals of the thesis focus on the design of new advanced cryptographic protocols for ensuring integrity of transmitted data, authenticity, confidentiality of transmitted data between low-cost devices and authenticity with non-repudiation of done events. The thesis describes proposal of three authentication protocols, one unilateral authentication protocol and two mutual authentication protocols. The thesis also describes proposals of two protocols for secured transmission of data between two devices, one protocol without a proof of receipt data and one protocol with proof of receipt data. In this thesis is also performed a security analysis and a discussion to proposed protocols.
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