This thesis describes methods of secret communication based on latin squares and their close relative, quasigroups. Different types of cryptosystems are described, including ciphers, public-key cryptosystems, and cryptographic hash functions. There is also a chapter devoted to different secret sharing schemes based on latin squares. The primary objective is to present previously described cryptosystems and secret sharing schemes in a more accessible manner, but this text also defines two new ciphers based on isotopic latin squares and reconstructs a lost proof related to row-latin squares. / Denna uppsats beskriver kryptosystem och metoder för hemlighetsdelning baserade på latinska kvadrater och det närliggande konceptet kvasigrupper. Olika sorters chiffer, både symmetriska och asymmetriska, behandlas. Dessutom finns ett kapitel tillägnat kryptografiska hashfunktioner och ett tillägnat metoder för hemlighetsdelning. Huvudsyftet är att beskriva redan existerande metoder för hemlig kommunikation på ett mer lättillgängligt sätt och med nya exempel, men dessutom återskapas ett, till synes, förlorat bevis relaterat till rad-latinska kvadrater samt beskrivs två nya chiffer baserade på isotopa latinska kvadrater.

The aim of this thesis was to examine changing representations of men and masculinities in a particular historical period (“The Sixties”) and to explore the impact that this had in a period of rapid social change in the UK and the legacy of that impact. In order to do this, a multi-method study was developed, combining documentary research with a set of eleven semi-structured interviews. The documentary research took the form of a case study of The Beatles, arguing that their position as a group of men who became a global cultural phenomenon, in the period under study, made theme a suitable vehicle through which to read changing representations of masculinities in this period and to reflect on what this meant for men in UK society. The Beatles’ live action films were chosen as a sample of Beatle “texts” which allowed for the Beatles to be looked at at different points in the “The Sixties” and for possible changes over that time period to be tracked. Textual analysis within discourse analysis (based on a framework suggested by van Dijk [1993], Fairclough [1995] and McKee [2003]) was used to analyse the texts. Ideas advanced by the Popular Memory Group (1982) about the interaction of public representations of the past and private memory of that past were influential in the decision to combine this piece of documentary research with interviews with a sample of men, in an age range of 18 to 74. The interview stage was designed to elicit data on the perception of the participants of the role of representation (with particular reference to the Beatles) of masculinities on them as individuals and their ideas about how this may have had an impact in terms of longer term social change. Ehrenreich’s (1983) notion of a male revolt in the late 1950s, an emergence of a challenge to established ideas about men and masculinity, was also influential, particularly as it is an idea at odds with the “crisis in masculinity” discourse (Tolson, 1977; Kimmel, 1987; Whitehead, 2002) at work in a number of texts on men and masculinity. Examining further Inglis’ (2000b : 1) concept of The Beatles as “men of ideas” with a global reach, the chosen Beatle texts were examined for discourses of masculinity which appeared to be resistant to the dominant. What emerged were a number of findings around resistance, non-conformity, feminised appearance, pre-metrosexuality, the male star as object of desire and The Beatles as a global male phenomenon open to the radical diversity of the world in a period of rapid social change. The role of popular culture within this process was central to the thesis, given its focus on The Beatles as a case study. However, broader ideas about the role of the arts also emerged with a resultant conclusion that “the sixties” is where a recognition of the importance of representation begins as well as a period where representations of gender (as well as class and race) became more accessible due to the rise in popularity of TV in the UK and a resurgence in British cinema. The thesis offers a number of ideas for further research, building on the outcomes of this particular study. These include further work on the competing crisis/ revolt discourse at work in the field of critical men’s studies, ascertaining female perspectives on representations of masculinities and their impact, further work on the Beatles through fans and an application of some of the ideas at work in the thesis to other periods of British history.

Secret sharing is critical to most applications making use of security and remains one of the most challenging research areas in modern cryptography. In this thesis, we propose a novel efficient multi-secret sharing scheme based on the Chinese remainder theorem (CRT) with two verification methods, while the previous works are mostly based on the Lagrange polynomial. Key management schemes play an important role in communication security in Wireless Sensor Networks (WSNs). While the previous works mainly targeting on two different types of WSNs: distributed and hieratical, in this thesis, we propose our flexible WSN key management scheme, which is based on (n,t,n) multi-secret sharing technique, to provide a key management solution for heterogeneous architecture. The powerful key managers are responsible for most of the communicational and computational workload. They can provide Peer-to-Peer pair-wise keys for a pair of sensors to establish a secure communication session, and in the same time, they can also form communication clusters as cluster heads according to different application requirements. Internet of Things (IoT) becomes more and more popular and practical in recent years. Considering the diversity of the devices and the application scenarios, it is extremely hard to couple two devices or sub-networks with different communication and computation resources. In this thesis, we propose novel key agreement schemes based on (n,t,n) multi-secret sharing techniques for IoT in order to achieve light weighted key exchange while using Host Identity Protocol (HIP). We refer the new schemes as HIP-MEXs with different underlying multi-secret sharing techniques. We analyzed the computational and communication costs of the extremely resource constrained device which is referred to as Initiator, and CRT based HIP-MEX successfully outsource the heavy workload to the proxy, which are considered more powerful, when establishing new secret key.

This thesis explores the implications of bearing witness as testimony, and the recuperation of community and identity in the wake of exile. Through a close reading of Elie Wiesel’s The Time of the Uprooted, alongside the theories of Jacques Derrida and Jean-Luc Nancy (among others), I argue that a True Testimony cannot exist, and yet despite this fact, there is a necessity to bear witness in the face of the Other. The realization suggests an imperative of a different order—one that steps back from the very notion of truth, to instead accept the impossibility of truth in any act of witnessing. By comparing Wiesel’s metaphysical framework to post-structural philosophies, I am able to blur the lines between an exile’s metaphysical feelings of isolation and strangeness from both others and themselves to the effects of recognizing and accepting that all language is différance.

The event known as the miracle of Cihost happened in a small village Číhošť in the region of Havlickuv Brod at the end of 1949, beginning of 1950. A crucifix moved on the altar during a sermon. The event led to an investigation and the detention of local priest, Josef Toufar, by the State Secret Police. Father Toufar became one of the first victims of the newly established totalitarian regime. This work called "The Media Portrayal of the Miracle of Cihost Over the Change of Time" presents the case known as the miracle of Cihost over three historical periods. The first period is connected with the origin of the case, therefore the end of 1949, beginning of 1950, the second period, which deals with events in Cihost to a certain extent, is the reform year 1968 and the last period is represented by the velvet revolution in 1989 which changed the established manner of functioning of state apparatus in our country and during which time the existing media system also transformed. The aim of this work is to point out the differences in the interpretations of this case in separate historical periods as each period deals with the case in question very differently. Part of this project was an effort to point out the political and media situation in all of the presented periods. Political and media events had...

The aim of the diploma thesis is to create competitive strategy of a middle-size company working in mechanical industry. The thesis analysis the current state and the internal factors of the analyzed firm with respect to the external factors. The competitive strategy and its implementation are suggested on the base of defined firm´s target and competitive advantages.

The thesis deals with the theme of secrets as itself and how it is related to the church. Its main issue if is it a church that creates mystery, or whether the mystery is creates church. Furthermore, the work seeks to examine the veracity of statements II. Vatican concilium, which identify the Church as sacrament, that mean the secret. The work examines the main approaches to the mystery and the language they speak about him. While access to the mystery, which has Gnostic character and is well characterized and defined conceptually, it can be seen that the designation anit-gnostic mystery of missing a simple term. Work and offers use of the term exotheric, which is contrary to esoteric and further work highlights the typical character and timbre of this exotheric mystery. The work also aligns with the mystery as objective scientific phenomenon and examines whether the other sciences (mathematics or astronomy) may be encountered exoteric and objective mystery. Investigate the findings are eventually applied to the discourse on the Church, which shows that if the church was not defined as secret, it would be reduced to mere human community and vice versa, if the Church was reduced only as a community insider secrets, it would be just another gnostic sect.

Thesis Czech folk scene and political persecution after 1977, deals with the events in Czechoslovakia folk music scene after the release of Charter 77. Thesis is focused on members of the folk group Šafrán (Saffron). Studied period of time is placed between 1977 and the first half of the 80s in Czechoslovakia. Thesis is divided into two parts. Introduction of the thesis and its first part is dedicated to the political and cultural situation of the 70s of the 20th century. The second part of the thesis describes the origin and development of folk music as an independent musical genre in Czechoslovakia. The main aim of the thesis is a partial depiction of life situation of folk singer-songwriters in the specified time period. Thesis is based on chosen musician's personal memories of political persecution, which was directed against their work as well. The final part of the thesis is dedicated to the development and course of the secret police Action Asanace (Redevelopment). The event had an impact not only on the personal lives of these artists, but also on the further development of folk music in the late 20th century in Czechoslovakia.

Bulan, Jiří. Je třeba reformovat české zpravodajské služby? Praha, 2011. 101 s. Diplomová práce (Mgr.) Univerzita Karlova, Fakulta sociálních věd, Institut politologických studií. Katedra mezinárodních vztahů. Vedoucí diplomové práce Gen. Ing. Andor Šándor. Abstract The thesis is a comparative analysis of the Czech intelligence system. It is trying to answer how and whether or not to reform the Czech intelligence services on the basis of scholarly articles and especially interviews with current and former intelligence officials and particular politicians. It turned out that among some of the Czech intelligence services and even within those services prevails the tense atmosphere, which had been caused by various personal failings. All the cases were the individual personal excesses, not the system errors. Representatives of the services assesses the ability to detect security threats very critically. The services miss particularly tight government management as well as the independent overview of the service operations. How to improve the intelligence services work? The intelligence community must establish a common vision that will emerge from a deeper internal discussion only. It is not possible to reform the system without it.

I denna uppsats tittar jag på utdrag av Victoria’s Secrets och Savage x Fentys bildflöden på Instagram, för att med hjälp av en semiotisk analys se hur de representerar kvinnlighet som en del av deras marknadsföring. Syftet är att undersöka skillnaden mellan märkenas visuella varumärkesbyggande, och hur det står i samband till konsumenters personliga identitetsbyggande. Resultatet analyseras utifrån litteraturstudier i form av vald teori kring representation, genus, distinktion, klass och märkeskultur. I min slutsats kommer jag fram till att de två märkena använder sig av liknande tecken som är olika kodade för att referera till kvinnlighet, och därför genererar olika budskap. På så sätt utvecklar de två flödena kulturella särdrag som konsumenter kan ta till sig som en del av sitt personliga varumärkesbyggande. / In this paper I examine excerpts from Victoria’s Secret’s and Savage x Fenty’s feeds on Instagram with the help of a semiotic analysis in order to see how they each represent women as a part of their marketing. The purpose is to investigate the difference between the two brand’s visual branding, and how it correlates to consumer’s personal branding. The result is then analysed with the help of selected theories regarding representation, gender, distinction, class and brand culture. In my conclusion I conclude that the two brands use similar signs that are coded differently to refer to femininity, and thus generates different messages. The two brands thus develop cultural characteristics that consumers can adopt as part of their personal branding.