National Repository of Grey Literature 21 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Quantum key distribution
Klíčník, Ondřej ; Burda, Karel (referee) ; Münster, Petr (advisor)
This thesis is indirectly related to the bachelor thesis Quantum key distribution over optical fiber infrastructure. Unlike the previous paper, the focus will be mainly on the practical application of the QKD (Quantum key distribution) system Clavis3. For this reason, physical phenomena related to practically used QKD protocols are briefly explained in the theoretical part. These are mostly based on phase coding. In particular, special attention is paid to the Coherent one-way protocol (COW) implemented in Clavis3 devices. This protocol is also compared with practical implementations of the BB84 protocol. Furthermore, the principles of other advanced QKD techniques are outlined and the phenomena in the optical fiber that may affect the quantum channel are discussed. A separate chapter is also devoted to standardization and topologies of QKD networks. Last but not least, the thesis addresses the topic of attacks against practical implementations of QKD protocols. In the practical part, measurements aimed at practical deployment of Clavis3 devices in a common communication network are performed. These include the possibility of combining a quantum channel into a single fiber together with classical channels using Wavelength-division multiplexing (WDM) and the analysis of the effect of Raman noise on the maximum communication distance. At the same time, the robustness of the system against polarization changes and fiber manipulation is verified. Finally, the performance of the system using three-state and four-state versions of the COW protocol is compared and the eavesdropping simulation module is tested.
Advanced proxy for penetration testing
Válka, Michal ; Vilém,, Šlesinger (referee) ; Sedlák, Petr (advisor)
This master’s thesis focuses on improving the open-source proxy tool for penetration testing of thick clients. The thesis is divided into three main chapters, the first of which is focused on the theoretical background on which the thesis is based. The second chapter describes the analysis of the current state and defines user requirements, which must be met. The third chapter deals with increasing the quality and expanding the functionality based on user requirements. At the same time, a testing methodology is created and a vulnerable application is developed as a teaching material for the methodology. The chapter concludes with a summary of the economic costs and benefits of the application for the penetration testing process.
MCUXpresso Web application security
Mittaš, Tomáš ; Heriban, Pavel (referee) ; Roupec, Jan (advisor)
This thesis deals with testing of the security of web application MCUXpresso Web SDK Builder using ethical hacking techniques and tools. At the beginning, the history of ethical hacking and structure of web applications are briefly mentioned. The thesis then analyses the application itself from the user’s point of view, its parts before logging in and after logging in and the operation of this application. The following is a list of the most common vulnerabilities and weaknesses found in web applications to understand any vulnerabilities found. Furthemore, the thesis deals with the techniques and tools of web application security and compares them. The penultimate chapter deals with the use of Analysis and vulnerability scanning technique on the application MCUXpresso Web SDK Builder. Finally, an application security test plan is designed, while part of this plan is automated.
Cyber crime
Bartůněk, Jan ; Gřivna, Tomáš (advisor) ; Herczeg, Jiří (referee)
Development of information technology is one of the most dynamic parts of today's global society. Along with the coming of new technologies it generates new types of crime, eventually existing types of criminal activities in this area are moving from the real world to cyberspace. This rapid development of cyber crime enforces corresponding changes in the legislation related to cyberspace. In the Czech Republic the most fundamental changes in cyber crime law have been made along with the new Criminal Code. The new code has modified some areas, that were not mentioned by previous criminal code, refined or amended previous terminology related to cyberspace and added institutes required by international commitments, especially by the Convention on Cybercrime. The purpose of this diploma thesis on "Cyber crime" is to outline the issues of cyber-crime, point out some troubling topics, which are currently present in cyberspace, and outline possible future development of criminal law in cyberspace. In the beginning of the thesis there is a short summary of cyberspace and cyber crime history, that is followed by definitions of selected basic concepts of cyberspace and cyber crime. In the following chapters, there is a summary of current Czech legislation of selected areas and there some examples of such...
77 millions user accounts have been stolen, should we worry? Analysis of Internet discussions relevant to the topic
Gregor, Filip ; Švelch, Jaroslav (advisor) ; Nečas, Vlastimil (referee)
Diploma thesis 77 million PlayStation Network accounts stolen, does it affect us?: An analysis of Internet discussions revolving around this topic deals with the case of what so far seems to be the biggest case of user information leak on the Internet. The introduction outlines the history and development of PlayStation consoles and maps major attempts to jailbreak the last generation of the console by hackers. The following section presents PlayStation Network itself, whose users were at risk of the loss of their online identity because of the attack and chronologically describes the course of breach-related events including the subsequent theft of user data. It also focuses in detail on the case of GeoHot - a hacker whose dispute with Sony alienated fellow hacker community and initiated retaliatory activities which as a result led to loss of data. Another part of the thesis examines the issue of digital identity and its protection, gives an insight into the history of the formation of the hacker community and further explains the phenomenon of existence and perception of the term hacker in the context of the Internet. The final section is devoted to analysis of selected discussion posts under thematically relevant articles, analyzes them in terms of content relevance, information sentiment and...
Legal Aspects of Fighting Cybercrime
Dostál, Otto ; Vlček,, Martin (referee) ; Šárek, Milan (referee) ; Hajný, Jan (advisor)
The thesis deals with the topic of computer crime. Foremost, it demonstrates on an example of the operation of a medical image information processing system some selected aspects of this issue. It shows that it is always necessary to monitor the current state of the technical knowledge at the time, but also the need of addressing the issue within the corresponding legal limits. The thesis presents criminal law reality as a complex system. The links between different parts of the system are examined, and possible shortcomings are considered. The legal instruments and legal limits of the procedures that can be used against cybercrime are evaluated. The thesis focuses especially on the issue of obtaining evidence under the Czech Criminal Procedure Code. It presents a proposal on how to understand individual procedural legal institutes and for what purposes and how to use them. Consequently it suggests legal procedures for specific selected practical situations.
Design and Creation of Proxy for Penetration Testing
Válka, Michal ; Bláha, Lukáš (referee) ; Dydowicz, Petr (advisor)
This bachelor’s thesis is aimed at design and development of proxy for penetration testing. The thesis is divided into three main parts and begins with a theoretical part, which is focused on fundamental technologies and principles on which the application is based. The second part is focused on comparison of currently available solutions. The third part contains the creation of the proxy itself. The last chapter contains a summary of this thesis and the benefits of the developed product for penetration testing.
Cyber crime
Bartůněk, Jan ; Gřivna, Tomáš (advisor) ; Herczeg, Jiří (referee)
Development of information technology is one of the most dynamic parts of today's global society. Along with the coming of new technologies it generates new types of crime, eventually existing types of criminal activities in this area are moving from the real world to cyberspace. This rapid development of cyber crime enforces corresponding changes in the legislation related to cyberspace. In the Czech Republic the most fundamental changes in cyber crime law have been made along with the new Criminal Code. The new code has modified some areas, that were not mentioned by previous criminal code, refined or amended previous terminology related to cyberspace and added institutes required by international commitments, especially by the Convention on Cybercrime. The purpose of this diploma thesis on "Cyber crime" is to outline the issues of cyber-crime, point out some troubling topics, which are currently present in cyberspace, and outline possible future development of criminal law in cyberspace. In the beginning of the thesis there is a short summary of cyberspace and cyber crime history, that is followed by definitions of selected basic concepts of cyberspace and cyber crime. In the following chapters, there is a summary of current Czech legislation of selected areas and there some examples of such...
77 millions user accounts have been stolen, should we worry? Analysis of Internet discussions relevant to the topic
Gregor, Filip ; Švelch, Jaroslav (advisor) ; Nečas, Vlastimil (referee)
Diploma thesis 77 million PlayStation Network accounts stolen, does it affect us?: An analysis of Internet discussions revolving around this topic deals with the case of what so far seems to be the biggest case of user information leak on the Internet. The introduction outlines the history and development of PlayStation consoles and maps major attempts to jailbreak the last generation of the console by hackers. The following section presents PlayStation Network itself, whose users were at risk of the loss of their online identity because of the attack and chronologically describes the course of breach-related events including the subsequent theft of user data. It also focuses in detail on the case of GeoHot - a hacker whose dispute with Sony alienated fellow hacker community and initiated retaliatory activities which as a result led to loss of data. Another part of the thesis examines the issue of digital identity and its protection, gives an insight into the history of the formation of the hacker community and further explains the phenomenon of existence and perception of the term hacker in the context of the Internet. The final section is devoted to analysis of selected discussion posts under thematically relevant articles, analyzes them in terms of content relevance, information sentiment and...
Information systems security penetration testing
Klíma, Tomáš ; Doucek, Petr (advisor) ; Čermák, Igor (referee) ; Čapek, Jan (referee) ; Štubňa, Ivan (referee)
The aim of this dissertation thesis is to develop new methodology of information systems penetration testing based on analysis of current methodologies and the role of penetration tests in context of IS/IT governance. Integral part of this aim is evaluation of the methodology. The first part of the thesis is devoted to the presentation of history and current state of research in selected area, definiton of basic terms and introduction of role of the penetration tests. This part is followed by the review of relevant sources and comparative study of current methodologies with a goal to identify their weaknesses. Results from this study are further used as a basis for new methodology development. Classification of IS penetration tests types and testing scenarios are also included. The second part includes design of new methodology, at first its history, structure and principles are presented, then its framework is decribed in high level of detail. In the third part the reader can find (theoretical and practical) validation. The biggest scientific contribution is the methodology itself focused on managment of penetration tests (which is the area currently not sufficiently descibed). Secondary contribution is the extensive review and the comparative analysis of current methodologies. Contribution to the economic and technical (practical) application we can mainly see in the development of new methodology which enables companies to improve management of penetration tests (especially planning, operational management and implementation of countermeasures).

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