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The design and cryptanalysis of the AES (Advanced Encyption Standard)
Říha, Jan ; Vábek, Jiří (referee) ; Tůma, Jiří (advisor)
Nazev prace: Konstrukce a kryptoanalyza AES (Advanced Encyption Standard) Autor: Jan Říha Katedra: Katedra Algebry Vedouci bakalafske prace: Doc. RNDr. Jin Tuma, DrSc. E-mail vedouciho bakalafske prace: Jiri.Tuma@mff.cuni.cz Abstrakt: V pfedlozene praci studujeme nejnovejsi symetrickou blokovou sifru AES. Nejprve se zabyvame vyvojem a vznikem sifry od vypsani souteze a2 po vyhlaseni vitezneho kandidata. Pote se venujeme jejf konstrukci, ve ktere se vyuziva nekterych netrivialnich poznatku algebry pfi praci s polynomy nad konecnym telesem. V teto kapitole je tez popsana prima inverzni sifra a ekvivalentni inverzni sifra slou^ici k desifrovani zasifrovanych dat. Ve tfeti kapitole zkoumame navrhovane implementace sifry AES na jednotlive platformy a nakonec rozebirame mozne utoky a odolnost Sifry AES vuci nim. Klicova slova: AES, sifra, implementace, kryptoanalyza Title: The design and cryptanalysis of the AES (Advanced Encyption Standard) Autor: Jan ftiha Department: Department of Algebra Supervisor: Doc. RNDr. Jin Tuma, DrSc. Supervisor's e-mail address: Jiri.Tuma@mff.cuni.cz Abstract: In the present work we study the newest symetric block cipher AES. At first we consider development and creation of the cipher from the start of selection proces till announcement of winning candidate. Then we turn to its...
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Evaluation the Financial Situation of the Selected Business Entity
Říha, Jan ; Pfeiferová, Daniela (advisor) ; Romana, Romana (referee)
The aim of the thesis is to evaluate the financial situation of the selected company Eutit Ltd. for a selected period. The firm is the world's largest producer of fused basalt. Assessing the financial situation will be made for the period 2012-2015.
The theoretical part focuses on the theoretical foundations of financial analysis, describes its objectives, principles of the method used most in practice provides a current view on the issue of financial analysis.
The practical part describes the selected company, its history and present. For the evaluation of economic situation of company Eutit Ltd. was the use of horizontal, vertical analysis, financial ratios analysis using bankruptcy or credibility models. Subsequently, the calculated values of indicators will be compared with the industry average values.
In conclusion, the evaluated results of the financial analysis are to determine the overall economic effectiveness of the selected company with evaluated as very positive.
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Employee’s Benefits
Matuška, František ; Říha, Jan (referee) ; Křížová, Zuzana (advisor)
The aim of this bachelor thesis is to describe benefits of employees and the manner in which they are used by employers and utilized by employees; it also concerns arguments for their utilization. The thesis examines tax and accounting aspects of the benefits of employees and determines a solution to the selected types of the benefits from the perspective of Czech legislation.
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Induced abortions in the years 1958-2012 in the Czech Republic
Hegarová, Hana ; Fučíková, Simona (advisor) ; Říha, Jan (referee)
The objective of the thesis primarily is to describe the history and development of the issue of abortion in relation to the various changes that the population of communities have passedthrough and determine whether legislative changes concerning abortion affect abortion indicators. Furthermore, the work focuses on the development of abortion in the Czech Republic in 1958 - 2012.This thesis examines in detail on the development of abortion legislation in Czechoslovakia and later in the Czech Republic and on the basis of these legislative changes values examines the link abortion with indicators made legislative changes. In the context of abortion among other things, analyzes the total fertility rate, total abortion rate, abortion rate of women according to their age, abortion by territorial differentiation and other indicators influencing the number of abortions in the Czech Republic.
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Census in selected European countries
Procházka, Matěj ; Langhamrová, Jitka (advisor) ; Říha, Jan (referee)
This thesis deals with the history of census over the years to present. In the 2011 was held last census in the most of European countries. In the following parts of my thesis there are described methods which are used to get data from population. Very important thing is to mention international documents and recommendations which are base for actual census. The history of census in selected European countries is described in the next chapter of the work. The history of Czech census is described more detailed than history of other countries. In the last part of my thesis there is comparison of indicators. The indicators are based on data which was obtained in the last census in 2011.
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Use of the M-learning in education
Říha, Jan ; Šedivá, Zuzana (advisor) ; Benáčanová, Helena (referee)
This thesis deals with a relatively new method of education called m-learning. It shows its advantages and disadvantages that may arise during its implementation. It also deals with current mobile technology and the appropriateness of its use for mobile learning. Research was conducted on the use of mobile technology in the study information system ISIS at the University of Economics in Prague, where it was also an emphasis on its potential shortcomings. The output is a recommendation of changes to its website for better use on mobile devices.
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The analysis of further development of study information system of University of Economics in Prague
Mynařík, Lukáš ; Benáčanová, Helena (advisor) ; Říha, Jan (referee)
The master thesis focuses on the study information systems used in Czech universities. The biggest part concerns the development of information system used in the University of Economics Prague. The goal of this thesis is to propose a way of a new development of this system, based on the analysis of other systems and to support it with the opinions of a representative sample of University of Economics students. The thesis itself is divided into 3 main parts. The first part shows the 4 most used study systems. Each system is analyzed from different viewpoints and its specifics are stressed. The analysis are made from interviews of the system developers and also web presentations of each subject. Each application solutions are compared with each other. The second part is devoted to the development of the information system of the University of Economics Prague. The author of this thesis expresses his opinion of the information system and proposes a recommendation concerning new functions and possibilities. The proposals are based on the experiences of other students of study information systems, or of the developer himself. All proposals are now in the third part introduced through the questionnaire to students of all other faculties of University of Economics Prague, where they themselves can express their opinions to proposed innovations or to the system in general. The results of the questionnaire are interpreted both in words and graphically.
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