Šiuo metu yra sukurta nemažai priemonių aptikti įvairiausias DDoS atakas, tačiau siekiant sustabdyti arba bent sušvelninti DDoS atakų poveikį yra nuveikta labai nedaug. Yra labai sunku pasirinkti tinkamą DDoS atakos atrėmimo metodą. DDoS atakų atrėmimo metodų analizė galėtų padėti pasirinkti tinkamiausią metodą. „BGP DDoS Diversion“ atakų atrėmimo metodas yra vienas efektyviausių ir mažiausiai kaštų reikalaujantis metodas. Šis metodas įgyvendinamas panaudojant BGP protokolą. Ataka yra atremiama kuomet BGP protokolo pagalba yra paskelbiama tik dalis tinklo. DDoS atakos duomenų srautas tokiu atveju yra nukreipiamas į paskelbtą tinklo dalį, o kita tinklo dalis lieka nepažeista atakos. Interneto paslaugų teikėjai naudodami „BGP DDoS Diversion“ atrėmimo metodą gali apsaugoti savo tinklą nuo visiško nepasiekiamumo. Šiame tyrime buvo išnagrinėti DDoS atakų atrėmimo metodai. Išsamiai analizei buvo pasirinktas „BGP DDoS Diversion“ atrėmimo metodas. Metodo analizei buvo pasirinkta virtuali terpė. Sudaryti virtualią terpę buvo pasirinkta OPNET tinklų modeliavimo programa. Panaudojant OPNET modeliavimo įrangą, buvo sukurtas virtualus tinklas, veikiantis Interneto tinklo pagrindu. Sukurtame tinkle buvo įgyvendintas „BGP DDoS Diversion“ atakų atrėmimo metodas. Šiame darbe yra pateikta minėto atrėmimo metodo veikimo charakteristikų analizė. / Nowadays there are lot of ways how to detect various types of DDoS attacks, but in order to stop, or at least to mitigate the impact of such DDoS attacks not enough work is done. It is very difficult to choose the right DDoS mitigation method. The research of DDoS attacks mitigation can provide a good manual how to choose the most appropriate method. „BGP DDoS Diversion“ method is one of the most effective and least cost to deliver DDoS mitigation method. This method is implemented using BGP protocol. BGP diversion mechanism is used to announce a specific part of the provider‘s network to (a part of) the Internet. Announcing a specific part of this network will divert the DDoS traffic and thereby prevent other parts of the provider‘s network becoming unreachable. This gives the provider the ability to continue providing services of the rest of his custumers. This research was based on analyzing the DDoS mitigation methods. For the better analyzes the „BGP DDoS Diversion“ method was chosen. To analyze this method the virtual environment was the best way to accomplish this task. OPNET modeler software was chosen to create the virtual environment. Using OPNET the virtual network was created. Virtual network was based on Internet network standards. „BGP DDoS Diversion“ method was implemented and tested in the virtual network. This research provides the detail analyzes of „BGP DDoS Diversion“ method.

Šiame darbe, remiantis Johan Eriksson ir Mark Rhinard tyrimo schema, nagrinėjama tai, kaip kibernetinio saugumo problemos kursto vidinio-išorinio saugumo įtampas Lietuvoje. Įvertinus jų dinamiką keturiais analitiniais „pjūviais“, identifikuojamas geriausiai Lietuvos atsaką į kibernetinio saugumo iššūkius apibūdinantis elgesio tipas. / In the broader sense the general object of observation considered in this paper is the influence of transboundary cyber-security issues on government behaviour. The main academic problem this paper deals with is how the relationship between internal external security concerns could be fully conceptualized to assess and explain the latter. The subject of this paper is not being analyzed through single theory or paradigm but from the perspective of middle-ranged approaches. This pragmatic approach helps better to unpack the complexity of cyber-security issues.As substitent theories cannot adequately assess the outcome of the expected changes this paper invokes an analytical framework built by Johan Eriksson and Mark Rhinard which encourages a strong focus on the nature of transboundary problems and their implications for changes in four dimensions: perceptions, policies, politics and polity. Analysing what implications new cyber-security issues have in each of these dimensions and explaining how aggregate effect of their interconnections determines Lithuania’s response to transboundary cyber-security challenges are the main tasks of this paper. These interim objectives are as follows: 1) evaluating the changes in Lithuania’s threat perceptions causes by the vulnerabilities of the emerging cyberspace; 2) examining the internal-external security nexus entrenched in Lithuania’s cyber-security policies; 3) looking at how the internal-external security nexus is being used in... [to full text]

This thesis analyses ATAKA&rsquo / s rise as a prominent actor in Bulgarian politics and to what extent this success is sustainable. The first section seeks the roots of authoritarianism in Bulgaria. The following section focuses on the restructuring and transformation in Bulgaria following the end of the Communist Party rule. The last section examines the reproduction of authoritarianism Bulgaria which is manifested through the rise of ATAKA in the last few years. Main argument of the thesis is that while the party&rsquo / s success has been rather fast and unexpected in the beginning, it was a result of the recreation of authoritarianism that has been present in the Bulgarian history and manifested itself through ATAKA and its xenophobic-racist rhetoric since 2005. While the sustainability of ATAKA&rsquo / s success in the long-term is in question considering its decline in the 2009 parliamentary elections, there is always the possibility of the authoritarianism resurfacing through different mediums, if not through ATAKA.

Darbo tema - viešojo rakto McEliece kriptografinės sistemos saugumo tyrimas. Darbe galima rasti kriptografijos temų detalią apžvalgą, išaiškintos rečiau naudojamos sąvokos. Atliktas atakų prieš viešojo rakto kriptografinių sistemų klasifikavimas. Tyrimo metu išanalizuotos kriptosistemos sudedamosios dalys, aptarta jų įtaka bendram sistemos saugumui. Darbe detaliai aprašytos realizuotos atakos prieš McEliece kriptografinę sistemą bei pateikti atakų vykdymo rezultatai bei apskaičiuota kiek truktų kiekviena ataka su saugiais laikomais parametrais t, k, n. Ištirtas atakų pavojingumas bei pateiktos išvados kaip nuo populiariausių atakų apsiginti. / Master thesis topic is McEliece public key cryptosystem’s security research. There is cryptography topics detailed review and explained in details rarely used notions. There some public key cryptosystems attacks classifications were done. There were cryptosystem components analysis and dependence on all system security also done. In this work we can find explained attacks against McEliece cryptosystem and results of tests with real world parameters t, k, n. In this work there was also explained dangerous attacks and presented conclusions how to protected against most popular attacks.

There are approximately 2.5 million cases of multiple sclerosis [MS] in the world. Each year, around 10,000 new cases of MS are diagnosed. There are approximately 0.1%. in the Czech Republic and that means that there are approximately 15,000 people with this disease. Multiple sclerosis is a progressive neurological inflammatory disease of the central nervous system in pathogenesis. The auto-immune mechanisms are appliedinvolves; both the affect the myelin and damaged axons. This damage is responsible for the permanent disability of MS. The main objective of this thesis was to use quantitative research to describe the occurrence of MS in the Regions of South Bohemia and Usti, and within objective to estimate the true prevalence of multiple sclerosis in the South and the Usti Regions. MUDr. Príkaszký and I used the method of descriptive epidemiological studies on the technique of data collection, as well as the analysis and the comparison of two sources using the double-capture method. As a research area, we used a set of patients with multiple sclerosis. The data were gathered in two regions of the Czech Republic: Usti nad Labem Region and South Bohemia. We investigated the number of patients from neurologists and MS centers in both regions.There is also the data on health insurance included with the Ústí Region in this research. According to the data, we estimated the prevalence of neurologists in South Bohemia to be 79.20 per 100,000 people. The MS Center at the hospital in Ceske Budejovice has registered 512 patients: 388 women and 124 men. The values of the MS Centre in Ceske Budejovice received from the neurologists are a total of 882 patients, which is a prevalence of 138.6 patients per 100,000 of the population. Regarding the Usti Region, the prevalence reported by neurologists is 208.2 per 100 000 people. The MS Center at the hospital in Teplice, has registered 1139 sick 730 women and 409 men. According to health insurance data in their database, of 1187 people listed with a diagnosis of G.35, 333 are men and 854 are women. This represents an estimate of the prevalence 305/100000 of the people who are registered in the NGA. We calculated the prevalence of illnesses from those sources in both of these regions is higher than the general estimates. When comparing the data source of health insurance and the model file from the MS center of Ústí Region, we calculated the overall sensitivity of 91.7% within a health insurance group. The calculation of the estimated prevalence has been reached by using the method of double-capture of those sources that provided an estimate of 2,681 patients in the Usti Region. The models of this data are mainly demonstrated as a possible approach to the estimate of the prevalence of this chronic disease in the case of multiple sclerosis. The information has been obtained from the collection of data. The results of this study can be used by other workers who have the same objective as this study.

Introduction: Multiple sclerosis (MS) is an autoimmune disorder of the CNS that typically affects young women of childbearing age. Due to the international published data, safety for pregnant women with MS can be assumed. However, no study has been published in the Czech Republic to address the effect of MS on pregnancy and perinatal outcomes. Objective: Analysis of the clinical course of patients with MS during and after pregnancy, and perinatal outcomes in comparison with healthy pregnant women. Methods: A single centre prospective observational study in the period 2006-2015 was conducted. Complete data from 68 patients with MS were analyzed (85 deliveries) and were compared with a control cohort of 68 age- and parity - matched healthy pregnancies. Results: The comparison between relapse rate and EDSS before, during and after delivery showed no statistically significant difference (relapse in 7.4% and 9.5%, EDSS 1.27 and 1.49). Perinatal outcomes were comparable in both cohorts. The weight of newborns differed by 159 g, (p = 0.295), complications in pregnancy were represented in 16.2% in the group with MS and in 27.9% in controls (p = 0.295), caesarean section was performed in 16.2% in patients with MS and in 23.5% of controls (p = 0.629), 79.4% of patients with MS were breast-feeding. In the MS...

The submitted thesis deals with the theme of a neurodegenerative autoimmune disease, the sclerosis multiplex. Although this serious disease has become an object of intensive research in recent decades and there is an inexhaustible quantity of literature available, we haven't yet fully identified the causes of this disease as well as we haven't found such kind of effective treatment that would lead to the permanent recovery of patients. I focused my interest on two main spheres: first, the description and comparison of practices in terms of pharmacotherapy giving priority to its benefits to patients, second, the view of another important but not always appreciated part of therapy, physiotherapy or rehabilitation; the main point is studying of processes and actions from the pedagogical point of view.