This thesis is dedicated to network layer protocol IPv6, purposes of its creation and penetration. Former chapters briefly describe IPv6 protocol format and protocols, methods and technologies related to IPv6. The thesis summarizes security risks and flaws in IPv6 and ICMPv6 protocols. In context of the risks and flaws the thesis describes several of local ICMP attacks. It also mentions security incidents resulting from exploiting those security flaws and means of countermeasures. One of the used countermeasures is passive monitoring of ICMP messages. Thesis contains brief description of tool used to achieve this - NDPMon with its advantages, disadvantages and concepts of usage. Rest of the thesis describes design and implementation of monitoring tool similar to NDPMon, but with some improvements.

Thesis (MA)--Stellenbosch University, 2011. / ENGLISH ABSTRACT: Somalia continues to intrigue scholars and policy-makers around the world, due to the fact that it is enduring what few others have, total state collapse. Not only does the situation defy easy explanation, the degree of state failure is unprecedented. After more than two decades without a functioning central authority, Somalia is now the longest-running instance of state collapse in postcolonial history. While researching and understanding state weakness and state failure is critical, it is useless unless combined with devising ways to prevent state failure in the future. Somalia provides policy makers with a unique opportunity to study the consequences of state collapse. Understanding the complex dynamics of state weakness and state collapse could ultimately help save the lives of thousands of people on the African continent. This study focuses on the mechanisms of coping by analysing the actors who have stepped up to fill the political vacuum left behind by the collapsing state. The role played by both state and non-state actors will be explored throughout this study. As it is not possible to address every actor who has played a part in Somalia since the implosion of the state in 1991, only the three most important internal and external actors will be analysed. The role played by the United Nations (UN) and the African Union (AU) will be discussed at length. The contributions made by neighbouring country Ethiopia, will also be investigated. Although the contributions and the impact of these external actors have in some instances led to undesired results, it does not change the fact that these actors attempted to fill the void in Somalia. Non-state actors positions within Somalia will also be examined in detailed. These actors include regional authorities, the role of Al-Shabaab, as well as the Islamic Courts Union. The study does not excuse the behaviour of these actors but rather discusses the rise of these organizations in light of the collapsing state and the position which they have taken up in Somalia to fill the political void. Lastly the role of the “Somali coast guards” also known as the Somali pirates, will be discussed.ipti / AFRIKAANSE OPSOMMING: Somalië bly die brandpunt van belangstelling vir geleerdes en beleidmakers dwarsoor die wêreld. Die hoofrede hiervoor is dat hierdie land ervaar het wat min ander lande het, naamlik algehele ineenstorting van die staat en bestuur. ‘n Maklike verduideliking of vereenvoudiging van die situasie is daar nie, want die ongeëwenaarde ineenstorting van stuktuur en staat, van Somalië is uniek. Twee dekades later is hierdie land nogsteeds sonder ‘n funksioneerende gesetelde staatsgesag. Hierdie tydperk is die langste voorbeeld van staatsineenstorting sonder herstel in post-koloniale geskiedenis. Navorsing en insig in elke staat se inherente swakhede en probleme help om mislukte bestuur te voorspel en te voorkom. Hierdie inligting moet korrek geimplimenteer en geinterpreteer word om krissise en mislukkings binne staatsbestel te verhoed. Somalië bied beleidmakers ‘n unieke geleentheid om die gevolge van totale staatsineenstorting te bestudeer en daaruit te leer. Net deur middel van begrip vir die komplekse dinamika van ‘n staat wat ineenstort en deur wanbestuur verswak word, sal daar uikoms vir duisende mense op hierdie vasteland kom. Sodoende sal ontelbare lewens in Afrika gered kan word. Hierdie studie analiseer die tegnieke van aanpassing, gebruik deur die rolspelers wat die politieke vakuum vul, wat deur die staatineenstorting nagelaat is. Die ondersoek fokus ook op die impak en effekte van beide interne en eksterne rolspelers. Aangesien dit onmoontlik is om die aandeel wat elke rolspeler sedert die ineenstorting van Somalië in 1991 gehad het te bestudeer, word net die drie belangrikste interne en eksterne rolspelers bespreek. Die Verenigde Nasies (VN), Afrika Unie (AU) en die buurland Ethiopië se bydraes sal ondersoek word. Alhoewel die bydraes en insette van hierdie eksterne rolspelers soms tot ongewenste resultate gelei het, bly die feit staan dat hulle probeer het om die leemtes in Somalië te vul. Ander belangrike rolspelers wat nie deel van die plaaslike regering is nie, sal ook in diepte bespreek word. Hierdie invloede binne Somalië sluit streeksowerhede in, asook die rol van Al Shabaab en die Islamitiese Howe Unie. Die studie verskoon nie die gedrag van die rolspelers nie, maar bespreek eerder die opkoms van hierdie organisasies. Dit word alles gesien in die lig van die ineenstorting van die staat en die posisie wat hulle in Somalië geneem het om mag te bekom en die politieke leemte te vul. Ten slotte word die omstrede rol van die "Somaliese kuswagte", anders bekend as Somaliese seerowers, bespreek.

A presente tese de doutoramento tem como objeto de pesquisa os imigrantes de origem russa no Brasil, principalmente na cidade de São Paulo, na primeira metade do século XX. A Revolução Russa de 1917 e a formação do Estado Soviético ocasionaram grandes mudanças na estrutura social da Rússia e produziram um fluxo emigratório inédito no século XX. As características migratórias dessas populações provocaram grandes debates nos países europeus e resultaram no surgimento de uma nova categoria migratória: o refugiado. No Brasil, os primeiros imigrantes da Rússia pós-­revolução começaram a chegar no começo dos anos 1920, tendo como principais destinos os estados do Sul e do Sudeste do país, principalmente a cidade de São Paulo, que se encontrava em fase de rápido crescimento econômico e urbano. Posteriormente, São Paulo recebeu mais duas grandes levas de imigrantes russos: os deslocados da Segunda Guerra Mundial, no final dos anos 1940, e os imigrantes russos da China, ao longo da década de 1950. Assim, as décadas de 1920 a 1950 foram o período de maior visibilidade dos imigrantes russos na cidade e dos processos mais intensos da estruturação de suas coletividades. Diante disso, a tese se concentra nesse intervalo de tempo. Num segundo momento, a tese se propõe a explorar o que significava ser russo em São Paulo nesse período. O trabalho está fundado na percepção de que nenhuma identidade é uma característica estável, mas um processo contínuo cujos resultados advém de uma complexa teia de interações entre o Estado, a sociedade, o grupo e o indivíduo. A tese, através de uma extensa pesquisa documental em arquivos públicos e particulares e com auxílio de depoimentos orais, busca identificar de que modo as formas de sociabilidade dos imigrantes russos em São Paulo foram fruto de suas concepções coletivas sobre seu pertencimento e sua lealdade nacional. A pesquisa identificou que a falta de homogeneidade nos percursos migratórios, e também nas concepções sobre o próprio pertencimento, resultou em uma comunidade de imigrantes marcada por constantes conflitos internos, com o Estado e com a sociedade no Brasil. Essa dinâmica comunitária, somada à postura repressiva do Estado à época em relação aos imigrantes, ocasionou grandes rupturas entre gerações e entre diferentes levas migratórias de russos na cidade, que impactaram as formas de sociabilidade dos russos na cidade até os dias de hoje. / The purpose of this doctoral thesis is the research of the Russian immigrants in Brazil, mainly in the city of São Paulo, in the first half of the twentieth century. The Russian Revolution of 1917 and the formation of the Soviet State led to major changes in the social structure of Russia and produced an unprecedented emigration flow. Migratory characteristics of these populations caused great debates in European countries and resulted in the emergence of a new immigration category: the refugee. The first post-­revolution Russian immigrants began to arrive in Brazil in the early 1920s. The main destinations were the South and the Southeast of the country especially the city of São Paulo, which was in rapid economic and urban growth phase. Later, São Paulo received two others large waves of Russian immigrants: the displaced persons of World War II in the late 1940s, and Russian refugees from China, throughout the 1950s. Thus, the decades from 1920 to 1950 were a period of increasing visibility of Russian immigrants in the city of São Paulo and of an intense process of structuring their communities. Therefore, the thesis focuses in this period. After this first analysis, this thesis explores what it meant to be Russian in São Paulo during said period. The work is based on the paradigm that no identity is a stable characteristic, but an ongoing process which results come from a complex network of interactions between the state, society, group and individual. The thesis, through an extensive documentary research in public and private archives and with the help of oral testimonies, seeks to identify how the forms of sociability of Russian immigrants in São Paulo were a result of their collective views on their sense of belonging and of national loyalty. The research identified that the lack of homogeneity in the migratory experiences and in the conceptions of belonging resulted in an immigrant community marked by constant internal conflicts. This communitarian dynamics, coupled with the repressive attitude of the Brazilian State towards immigrants, caused major gaps between generations of Russian immigrants in the city, which impacted the forms of their sociability in the city until today.

A presente tese de doutoramento tem como objeto de pesquisa os imigrantes de origem russa no Brasil, principalmente na cidade de São Paulo, na primeira metade do século XX. A Revolução Russa de 1917 e a formação do Estado Soviético ocasionaram grandes mudanças na estrutura social da Rússia e produziram um fluxo emigratório inédito no século XX. As características migratórias dessas populações provocaram grandes debates nos países europeus e resultaram no surgimento de uma nova categoria migratória: o refugiado. No Brasil, os primeiros imigrantes da Rússia pós-­revolução começaram a chegar no começo dos anos 1920, tendo como principais destinos os estados do Sul e do Sudeste do país, principalmente a cidade de São Paulo, que se encontrava em fase de rápido crescimento econômico e urbano. Posteriormente, São Paulo recebeu mais duas grandes levas de imigrantes russos: os deslocados da Segunda Guerra Mundial, no final dos anos 1940, e os imigrantes russos da China, ao longo da década de 1950. Assim, as décadas de 1920 a 1950 foram o período de maior visibilidade dos imigrantes russos na cidade e dos processos mais intensos da estruturação de suas coletividades. Diante disso, a tese se concentra nesse intervalo de tempo. Num segundo momento, a tese se propõe a explorar o que significava ser russo em São Paulo nesse período. O trabalho está fundado na percepção de que nenhuma identidade é uma característica estável, mas um processo contínuo cujos resultados advém de uma complexa teia de interações entre o Estado, a sociedade, o grupo e o indivíduo. A tese, através de uma extensa pesquisa documental em arquivos públicos e particulares e com auxílio de depoimentos orais, busca identificar de que modo as formas de sociabilidade dos imigrantes russos em São Paulo foram fruto de suas concepções coletivas sobre seu pertencimento e sua lealdade nacional. A pesquisa identificou que a falta de homogeneidade nos percursos migratórios, e também nas concepções sobre o próprio pertencimento, resultou em uma comunidade de imigrantes marcada por constantes conflitos internos, com o Estado e com a sociedade no Brasil. Essa dinâmica comunitária, somada à postura repressiva do Estado à época em relação aos imigrantes, ocasionou grandes rupturas entre gerações e entre diferentes levas migratórias de russos na cidade, que impactaram as formas de sociabilidade dos russos na cidade até os dias de hoje. / The purpose of this doctoral thesis is the research of the Russian immigrants in Brazil, mainly in the city of São Paulo, in the first half of the twentieth century. The Russian Revolution of 1917 and the formation of the Soviet State led to major changes in the social structure of Russia and produced an unprecedented emigration flow. Migratory characteristics of these populations caused great debates in European countries and resulted in the emergence of a new immigration category: the refugee. The first post-­revolution Russian immigrants began to arrive in Brazil in the early 1920s. The main destinations were the South and the Southeast of the country especially the city of São Paulo, which was in rapid economic and urban growth phase. Later, São Paulo received two others large waves of Russian immigrants: the displaced persons of World War II in the late 1940s, and Russian refugees from China, throughout the 1950s. Thus, the decades from 1920 to 1950 were a period of increasing visibility of Russian immigrants in the city of São Paulo and of an intense process of structuring their communities. Therefore, the thesis focuses in this period. After this first analysis, this thesis explores what it meant to be Russian in São Paulo during said period. The work is based on the paradigm that no identity is a stable characteristic, but an ongoing process which results come from a complex network of interactions between the state, society, group and individual. The thesis, through an extensive documentary research in public and private archives and with the help of oral testimonies, seeks to identify how the forms of sociability of Russian immigrants in São Paulo were a result of their collective views on their sense of belonging and of national loyalty. The research identified that the lack of homogeneity in the migratory experiences and in the conceptions of belonging resulted in an immigrant community marked by constant internal conflicts. This communitarian dynamics, coupled with the repressive attitude of the Brazilian State towards immigrants, caused major gaps between generations of Russian immigrants in the city, which impacted the forms of their sociability in the city until today.

No description available.

Made available in DSpace on 2015-03-05T17:20:09Z (GMT). No. of bitstreams: 0 Previous issue date: 16 / Nenhuma / O problema dos apátridas e refugiados de guerra, no panorama mundial, é um dos entraves onde mais podemos observar a crise de sentido que atravessa as relações humanas na modernidade recente. Constata-se a insuficiência da concepção abstrata de direitos humanos tradicional. O presente trabalho procura estabelecer um novo ponto de partida para esta questão: - a alteridade-, a partir do reconhecimento da diferença. O primeiro capítulo verifica como a lógica da totalidade disseminada na racionalidade ocidental traz implicações no desenvolvimento do individualismo presente no período atual e como a concepção de “tolerância” ainda é um empecilho frente ao ideal de hospitalidade cosmopolítica. No segundo capítulo, aborda-se a ética da alteridade como filosofia primeira e alternativa à crise de sentido que envolve a razão instrumental e a insuficiência do direito como regulador social, em contra-posição com a idéia de justiça como desconstrução. Enfim, no terceiro capítulo, problematiza-se filosoficamente como a vit / The issue concerning the stateless person and war refuges reveals the crisis of meaning which crosses over the human relationships in modernity. It has been realized the insufficiency of the traditional abstract notion of human rights. The work here presented tries to establish a new starting point for this issue: - alterity-, by recognizing the difference. The first chapter verifies how the totality logics, spread in the occidental rationality, brings implications in the development of today’s individualism and how the conception of “tolerance” is still an obstacle for the ideal of cosmopolitics hospitality. In the second chapter, the alterity’s ethics is approached as first philosophy and as an alternative to the meaning crisis that involves the instrumental reason and the insufficiency of the law as a social regulator, opposing to the idea of justice as a deconstruction. At the end, in the third chapter, it is philosophically questioned how the victory of the totality works in the covering of alterity on t

The main goal of this thesis is to design and implement a mechanism that provides protection against stateless tracking with browser fingerprint. Implemented tool has a form of module that takes part of JavaScript Restrictor extension. The module allows to specify heuristics used for evaluation of visited sites that may contain browser fingerprint extraction. If suspicious activity is detected, all subsequent HTTP requests from that site are blocked to prevent the extracted fingerprint from being sent to the server. The implementation and defined heuristics were tested. The resulting module represents an effective tool against stateless tracking. The main limitation of the implementation is possible corruption of sites by blocking HTTP requests.

This thesis examines trends in the academic and professional literature around immutable data and its relationship with declarative User Interfaces (UIs). Immutable data types are preferred by academic authors due to their increased safety, and commercial languages are increasing their support for them over time. More recently, declarative UIs are an exploding topic in industry, and these are related, although not as closely as one would expect. Declarative programming tries to focus on highlevel requirements, not low-level details. It is easier to do this if functions have no side effects, and immutable data is a guaranteed way of achieving this. To highlight this property, the declarative UI framework Flutter advertises “stateless widgets”, but their existence puts in highlights the lack of this property in most widgets. Consequently, we ask whether it is feasible to build a Graphical User Interface (GUI) toolkit using purely immutable data structures. To accomplish this objective, a purely immutable GUI toolkit is sketched and partially developed using Elm, a purely functional language in which all data structures are immutable. To understand the requirements of a GUI toolkit, we categorize and put in historical context, different design paradigms for UIs and relate them to core software-design principles. Leading toolkits allow developers to visualize and manage multiple views of their interfaces, including the view hierarchy, layout, interface to business logic, and focus management. By creating a concrete example, the research aims to provide insight into the limitations of utilizing purely immutable data within a GUI framework and suggests future work to mitigate these. / Thesis / Master of Science (MSc)

Plus de soixante ans après son adoption, la Convention de Genève compte 145 États parties.Instrument juridique universel sur le statut des réfugiés, elle est la lex specialis du droit international desréfugiés. Qui est réfugié ? Quelle protection lui est accordée ? Ces deux questions se posent avec uneacuité certaine du fait de l’accroissement des flux migratoires, des crises multiples et de la lutte contre leterrorisme. Le contexte actuel de l’application de la Convention est différent de celui de son adoption.Rédigée par la voie de dispositions générales, elle doit être interprétée pour être appliquée. Cependant, iln’existe pas un interprète. Si les États, le Haut Commissariat des Nations Unies pour les réfugiés et laCour internationale de justice sont les interprètes officiels, ils ne sont pas les seuls. L’Office français deprotection des réfugiés et apatrides et la Cour nationale du droit d’asile jouent un rôle important et la Coureuropéenne des droits de l’homme et la Cour de justice de l’Union européenne jouent un rôle grandissant.Cette multiplicité d’interprètes peut causer une diversité d’interprétations. Or, les interprétationsdivergentes nuisent à la lisibilité et la visibilité de la Convention en tant qu’instrument de définition et deprotection des réfugiés. La présente étude est une analyse de la contribution des interprètes aux évolutionsde la Convention. Dans cette perspective, la prolifération des instruments du droit européen etinternational des droits de l’homme et la complexification des déplacements contraints de personnes sontdes paramètres incontournables, pris en compte par les interprètes, pour éclairer le sens et la portée de laConvention. / More than sixty years after its adoption, the Geneva Convention counts 145 States ascontracting Parties. This universal legal instrument on refugee’s status represents the lex specialis ofinternational refugee Law. Who can be a refugee? What can be his level of protection? These questionsare particularly relevant under the influence of the increasing population flows, the multiples crises andthe fight against terrorism. The current context of the Convention’s application is different than the one ofits adoption. And due to its general provisions, this Convention needs to be interpreted in order to beapplied. However, there is no sole interpreter. The States, the United Nations High Commissioner forRefugees and the International Court of Justice are indeed the official interpreters, but not the only onesensuring this mission. Not only the French Office for the Protection of Refugees and Stateless Persons andthe National Court of Asylum play an important role in this matter, but the European Court of HumanRights and the Court of Justice of the European Union also play an expanding role. This multiplicity ofinterpreters can induce a variety of interpretations. Nevertheless, a divergent interpretation can affect thereadability and the visibility of the Convention as a refugee defining and protective legal instrument. Thepresent study constitutes an analysis of the interpreters’ contribution to the Convention’s developments. Inthis perspective, the overgrowth of European and International Human Rights Law instrument and thecomplexity of forced migration are ineluctable feature, taken into account by the interpreters, to clarify themeaning and the scope of the Convention.