This document describes methods for a reconstruction of data types in the decompilation problem. It defines the concept of reverse engineering and introduces decompiler developed by the Lissom project. It presents existing methods of reconstruction of the simple and complex data types, and explains in detail approaches based on data-flow analysis and analysis of the memory operation offsets. The core of this thesis is the design of a new technique of reconstructing simple and complex data types, suitable for deployment in a retargetable decompiler environment of the Lissom project. Basic principles of the new technique, its implementation and related changes in decompiler and intermediate language are described. The solution is tested and the conclusion discusses the achievements, shortcomings and direction of the further work.

This work deals with the operation of Data Boxes in relation to public institutions, namely the Czech Social Security Administration. The introduction is devoted to a summary of the historical development of Data Boxes and description of the basic rules for using the Information System of Data Boxes. There is a mention of the role of Data Boxes in the Czech eGovernment and its relationship to the other elements. Finally, there are listed and briefly discussed the basic legislation with the problems related to Data Boxes. The next part deals with analysis of the situation in the Czech Social Security Administration in the sphere of Data Boxes. It describes situation in the delivery of documents before commissioning of Data Boxes and the situation occured after their commissioning. Follows the comparision of this periods and the evaluation the impact of the introduction of Data Boxes for the operation of Czech Social Security Administration. The final part of the work focuses the analysis of the problems arising from the Czech Social Security Administration in connection with the operation of Data Boxes and suggests possible options for addressing these problems.

This work addresses the issue of data boxes information system, which supports electronic communication between public authorities and other bodies. Aim of the work is to identify measure and evaluate the effectiveness of the data boxes at selected public authorities when processing received and sent documents. The effectiveness is detected by using the proposed metrics and also based on the analysis conducted in order to examine the processing of documents at selected institutions. The effectiveness of data boxes is being researched at the Municipal Office Dub nad Moravou and the Czech Agriculture and Food Inspection Authority. The information needed for the process analysis and the data required for evaluating the effectiveness of the implementation of the proposed metrics were obtained from the staff of those institutions. The work is divided into four parts. The first part is a thorough description of the data boxes information system. The functionality, use, technical solutions and legislations of data boxes are described based on available information. The second part focuses on the description and analysis of selected public authorities and on the way they process received and outgoing mail. In the third part of the work appropriate metrics to assess the effectiveness of the data boxes are proposed, followed by implementation of two-phase measurements. In the fourth section the effectiveness of the data boxes is evaluated based on the measurements conducted at selected public authorities. The main contribution of this work is that it will be the first evaluation of the effectiveness of the data boxes in selected subjects approximately one month after the official launch. Another benefit is the proposal of process for the evaluation of the effectiveness of a very specific new information system within the body and a comprehensive description of the data boxes information system.

This diploma thesis discusses problems of data boxes information system and its possible integration with various information systems through the use of particular software tool developed by company Ixtent s.r.o. In the first part of this thesis is data boxes information system (ISDS) established into wider contexts and defined by terms. In the second part of this thesis are described options to connect ISDS and other various business applications. In so doing the software tool "connector ISDS" id used. In the third part are discussed particular realized project, case studies and real benefits of these projects.

This diploma thesis deals with the effects of Act 300/2008 about electronic acts and authorized document conversion to legal entities entered in the Commercial Register. The goal of thesis is to affect the extent of changes that legal entities had to undergo after the launch of the Information System of Data Boxes, and to show on the examples of commercial solutions how these changes can be effectively addressed. The work contains two case studies on which the typical practical problems of large companies are shown. First chapter contains an overview of the eGovernment introduced in the Czech Republic, and detailed description of the Information System of Data Boxes and data messages. This chapter also discusses the electronic signing of documents and associated problems. The second chapter lists the changes which legal entities had to settle, and also solution is mentioned, especially for large companies, helping to streamline the processes associated with receiving, sending and archiving of data messages. The third chapter shows the difficulties that come along with operating the product for effective management of data boxes and proposals of their possible solutions.

This diploma thesis describes information system of data boxes (ISDS). This system is characterized in terms of law about electronic operations and authorized conversion of documents no. 300/2008 commissioning the entire system. Based on statistical data provided by Ministry of the Interior, the system traffic and financial expenses are analyzed. Examined period is the start of the system in June 2009 and the end of period is October 2015. After analysis there is comparison with the period prior to launch of ISDS. Then I applied Multiple-criteria decision method on those two periods. Outcome of Multiple-criteria decision indicates that the ISDS is beneficial for users, rapidly enhances and accelerates electronic communication

A significant problem of functioning the public sector is to ensure the efficiency of public expenditures. Efficiency model's creating is a dynamic process that requires regular evaluation of the socioeconomic conditions. The efficiency of financial system and granting social services is still not measured in the Czech Republic. The area of social services is affected by number of criteria and factors. So it is necessary to apply different views on evaluating the efficiency of social care, social prevention and social counseling. The efficiency of social services can not be estimated as a whole, but we should focus on different groups of social services and individual services within the group. In this thesis the efficiency is measured in the two selected residental social care services -- homes for the elderly and homes for people with disabilities. The applied methods was used only to a limited extent because of lacks of many important variables in the area of official statics. In the case of multiple criteria methods the calculation was also impeded by the availability of suitable software.

Communication in public networks based on the IP protocol is not really anonymous because it is possible to determine the source and destination IP address of each packet. Users who want to be anonymous are forced to use anonymization networks, such as Tor. In case such a user is target of lawful interception, it presents a problem for those systems because they only see that the user communicated with anonymization network and have a suspicion that the data stream at the output of anonymization network belong to the same user. The aim of this master thesis was to design a correlation method to determine the dependence of the data stream at the input and the output of the Tor network. The proposed method analysis network traffic and compares characteristics of data streams extracted from metadata, such as time of occurence and the size of packets. This method specializes in correlating data flows of protocol HTTP, specifically web server responses. It was tested on real data from the Tor network and successfully recognized dependency of data flows.

Scope of this master’s thesis contains agile data warehouse design. It begins with a brief demonstration of data warehouse issues, shows the architectures dimensional data warehouse, corporate information factory and data vault. Furthermore, the thesis introduces agile methodologies suitable for data warehouses. Main part of this thesis focuses on the data warehouse design and development in Kentico Software s.r.o. using the modelstorming, shows implementation of universal ETL process for loading dimensional data warehouse, designs ETL processes, data warehouse storage and presentation layer. In the end, the thesis discusses future extensions to the data warehouse such as knowledge discovery module or large-scale data expansion.

This thesis work is to do with the Information system of data boxes (ISDS) which is introduced from legislation's and user's point of view. Because the introduction of this system has influenced hundreds of thousands of subjects the main target of this thesis is to find out about the impact of the ISDS on users with the help of the analysis method. In this work firstly the data provided by the Ministry of Internal Affairs are examined and interpreted, secondly the results of the poll conducted by the author and then a cost-benefit analysis of the system from the users' point of view is carried out. The results of the work show that the ISDS was at the end of the examined period (2009 -- 2013) beneficial for its users and the total economic benefit for the respective period is 3.6 billion Czech crowns. This means that every crown spent on the operation of the system by the Ministry of Internal Affairs represents savings of 2 Czech crowns. The author of this work has come to the conclusion that the system is from a legislative, technological and economic point of view very well created. The author recommends to the system administrator its further development and also recommends to use its potential among thousands of OSVČ (the self-employed).