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Deniable encryption
Šebek, Marcel ; Tůma, Jiří (advisor) ; Krajíček, Jan (referee)
In the thesis we study deniable encryption, as proposed by Canetti et al. (CRYPTO 1997). Standard encryption schemes guarantee good security level unless the adversary is able to force the sender and/or receiver to reveal her secret knowledge. Assuming that the adversary knows true ciphertext, the se- cret inputs usually commits the sender/receiver to the true plaintext. On the contrary, deniable scheme is equipped with algorithms that provide alternative secrets which makes the adversary believe that different plaintext was encrypted. We recall the most important results in the area, in particular, the schemes of Canetti et al. (CRYPTO 1997), the scheme of Klonowski et al. (SOFSEM 2008) based on ElGamal encryption, schemes of O'Neill et al. (CRYPTO 2011), and schemes and impossibility result of Bendlin et al. (ASIACRYPT 2011). In ad- dition to presenting known results in an unified environment, we deeply investi- gate simulatable-encryption based schemes. In particular, we construct a scheme that is bideniable, and both of its induced schemes are receiver-deniable (in the flexible/multi-distributional setting). We also disprove part of the results of Bendlin et al. (ASIACRYPT 2011) by showing that their construction of fully bideniable scheme is wrong. This result is verified using computer simulation....
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Legal Regulation of the Radio and Television Broadcast in the Czech Republic
Šebek, Marcel ; Benda, Josef (advisor) ; Šmíd, Milan (referee)
The thesis Legal Regulation of the Radio and Television Broadcast in the Czech Republic deals with an analysis and description of relevant legal regulations applicable in the area of broadcasting and television in the Czech Republic and with a closer insight in the main legal institutes and entities. A theoretically-juridical opening is followed by an introduction of the Czech Republic and European Union legal systems. The core of the thesis is the main topic, which is the legal regulation of the radio and television broadcasting in the Czech Republic. This part is opened by a short historical abstract followed by chapters dedicated to particular legal regulations. The Broadcasting Act, the Act on Czech Television, the Czech Television Code, the Act on Czech Radio, the Czech Radio Code and the Act on Audio Visual Media Services upon Request are described in individual chapters. The closing part is dedicated to some of the legal regulations and their provisions that are more remotely related to the subject. Individual chapters describe relevant legal institutes of the Act on Advertising Regulation, the Advertising Council Code of Ethics, the Consumer Protection Act, the Commercial Code and the Civil Code.
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Deniable encryption
Šebek, Marcel ; Tůma, Jiří (advisor) ; Krajíček, Jan (referee)
In the thesis we study deniable encryption, as proposed by Canetti et al. (CRYPTO 1997). Standard encryption schemes guarantee good security level unless the adversary is able to force the sender and/or receiver to reveal her secret knowledge. Assuming that the adversary knows true ciphertext, the se- cret inputs usually commits the sender/receiver to the true plaintext. On the contrary, deniable scheme is equipped with algorithms that provide alternative secrets which makes the adversary believe that different plaintext was encrypted. We recall the most important results in the area, in particular, the schemes of Canetti et al. (CRYPTO 1997), the scheme of Klonowski et al. (SOFSEM 2008) based on ElGamal encryption, schemes of O'Neill et al. (CRYPTO 2011), and schemes and impossibility result of Bendlin et al. (ASIACRYPT 2011). In ad- dition to presenting known results in an unified environment, we deeply investi- gate simulatable-encryption based schemes. In particular, we construct a scheme that is bideniable, and both of its induced schemes are receiver-deniable (in the flexible/multi-distributional setting). We also disprove part of the results of Bendlin et al. (ASIACRYPT 2011) by showing that their construction of fully bideniable scheme is wrong. This result is verified using computer simulation....
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Law and Marketing
Šebek, Marcel ; Gerloch, Aleš (advisor) ; Beran, Karel (referee) ; Švarc, Zbyněk (referee)
The aim of this thesis is to analyse legal regulations of marketing and advertising in the Czech Republic as well as in the European context and define possibilities of applications of marketing methods and tools in the field of legal services. This is followed by a detailed elaboration for advocacy being the most marketable branch within this field. Based on the analysis of classic marketing mix tools, the aim is to create a set of marketing instruments suitable for the selected field of advocacy services. The thesis takes into consideration particularly strong characteristics of legal services as such. The theoretical part of the thesis is opened by a chapter dealing with the issue of marketing in general. Defining the respective branch and identifying its basic descriptive signs creates a terminology basis for further development of the subject. Special attention is paid to individual key marketing components, the main one being the strategic marketing management and its main variables composed of the following: company mission, company objectives, company strategies and company opportunities. A strategic marketing process, formed by planning, implementation and control stages, is also elaborated. The planning stage is composed of a marketing situational analysis, setting of marketing...
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Aplikace marketingu v právních službách
Šebek, Marcel JUDr. ; Hesková, Marie (advisor) ; Kovář, František (referee)
Práce se zabývá analýzou marketingových nástrojů, druhů právních služeb a blíže pak služeb advokátů, s důrazem na jejich specifika a legislativní omezení. Praktická část práce se zabývá analýzou trhu právních služeb a popisem a hodnocením provedeného marketingového výzkumu. Poslední část práce řeší konstrukci marketingového mixu vhodného pro oblast advokacie na základě získaných informací.
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