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Generating random data from biometric samples
Sachová, Romana ; Říha, Zdeněk (advisor) ; Vondruška, Pavel (referee)
Title: Generating random data from biometric samples Author: Bc. Romana Sachová Department: Department of Algebra Supervisor: Ing. Mgr. Zdeněk Říha, Ph.D. Supervisor's e-mail address: zriha@fi.muni.cz Abstract: This thesis aims to achieve the generation of random data from the bio- metric samples. Studying the biometric characteristics, randomness and generation of random data suitable for cryptography as well the variability of fingerprint, iris, face and human voice. In the practical part has been tested the variability of 200 prints from the same finger, using three factors: 1) The coordinates of fingerprints cores. Due to the repeatability of coordinates the obtained entropy was low. 2) Fingerprint area approximation. It was able to verify the diversity of all areas. The maximum available entropy remains around 15 bits. 3) Ridge lines distortion. From the core to the top of the fingerprint has been taken boxes containing part of the ridge line. For all boxes was calculated the average phase angle of the gradient which represents the change of intensity in the box. Vector of phase angles describes the ridge line distortion. Maximum estimated entropy of this vectors was estimated at 71,586 bits. Keywords: biometry, randomness, entropy 1
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Generating random data from biometric samples
Sachová, Romana ; Říha, Zdeněk (advisor) ; Vondruška, Pavel (referee)
Title: Generating random data from biometric samples Author: Bc. Romana Sachová Department: Department of Algebra Supervisor: Ing. Mgr. Zdeněk Říha, Ph.D. Supervisor's e-mail address: zriha@fi.muni.cz Abstract: This thesis aims to achieve the generation of random data from the bio- metric samples. Studying the biometric characteristics, randomness and generation of random data suitable for cryptography as well the variability of fingerprint, iris, face and human voice. In the practical part has been tested the variability of 200 prints from the same finger, using three factors: 1) The coordinates of fingerprints cores. Due to the repeatability of coordinates the obtained entropy was low. 2) Fingerprint area approximation. It was able to verify the diversity of all areas. The maximum available entropy remains around 15 bits. 3) Ridge lines distortion. From the core to the top of the fingerprint has been taken boxes containing part of the ridge line. For all boxes was calculated the average phase angle of the gradient which represents the change of intensity in the box. Vector of phase angles describes the ridge line distortion. Maximum estimated entropy of this vectors was estimated at 71,586 bits. Keywords: biometry, randomness, entropy 1
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PERCEPTION OF SPACE - DIMENSIONS OF SET-UP VIEW
Vondruška, Prokop ; ŽIŽKA, Tomáš (advisor) ; MAKONJ, Karel (referee)
The thesis deals with the perception of space as in theater and in public.
It is trying to find a way how to work with the perception of space and how to bring life to the space with activators. It also explains the term "pohledovost" - (visual perfection ? set-up view) and its impact on the work in expanse. All this is explained from the feedbacks from projects, that arose during the studies from 2010 to 2013.
The thesis is divided into seven parts. The goal of this dissertation work and its impulses are explained in the first part. The second part clarifies the processes of thoughts leading to the perception of space. The third section describes the development of considerations to an activator. The fourth section describes the production, application and transformation of the activator. The fifth section deals with the perception of theatrical space and with the visual perfection. The sixth section summarizes my findings. The final chapter contains the list of used sources.
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Opportunities and conditions of use of social networks to increase competitiveness
Vondruška, Pavel ; Molnár, Zdeněk (advisor) ; Nečas, Miroslav (referee)
The diploma thesis is focused on the social networking sites in terms of their use for increasing the competitiveness of companies. The first part deals with a theoretical introduction to social networks where the basic concepts are defined and then characterized by major networks globally. Each social network is analyzed both in terms of the structure of its users, and are listed as individual options, which provides for promotion within their system - they are mentioned both paid and unpaid opportunities. At the end of this section are described the general possibilities of using social networking for business - ways to measure the impact of these activities, risks and requirements of their operation within the company. The second part is a practical solution to use social networks to support the selected e-commerce business. The introduction provides basic parameters of the e-shop is defined by the competitive environment. The analysis carried out various solutions to various social networks. It is designed and implemented their own social network to the target audience the company. The practical part ends with a final report including recommendations for further progress in the use of social networks. The main contribution of the paper is to present a detailed analysis of selected enterprise communication on social networks, including putting all the relevant data from which the conclusion can be drawn in specific recommendations to further enhance competitiveness.
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Tools for searching information about people on the Internet
Vondruška, Petr ; Pavlíček, Luboš (advisor) ; Molnár, Zdeněk (referee)
The purpose of this bachelor thesis is to summarize information about finding people on the Internet and to introduce specific information resources in this field and information gathering tools for effective searching in these resources. The first part introduces general view on this field, belonging to Open-source intelligence (OSINT). Terms as real identity or virtual (online) identity and technical identity are described. The Intelligence cycle is introduced as an optimal way for searching and processing information. The next part of this study is more practical and describes relevant information resources for gathering information about people. The study provides a description of tools for searching in these resources. This part is based on practical tests of described tools. Most of these tools are used specially for searching in one specific information resource and they do this work better than universal web search engines. The study provides also comparison of selected searching tools which are more complex (search engine Google, meta-search tools Professional Web Orchestra and Copernic Agent, information gathering and forensic analysis tool Paterva Maltego and complex tool for information searching and analysis Tovek Tools). The last part introduces information analysis and processing. This part includes description of tools for graphical data analysis or social network analysis. This study also describes possibility of information relevance review and description of how can final report look like.
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