<p>Digital television broadcasters use conditional access (CA) systems to protect some of their services from being viewed by people not subscribing for these services. A manufacturer of digital television receivers develops applications to handle the CA systems that the receiver shall support. A problem for the application developer is that a CA application developed for one specific CA system is usually not reusable for other CA systems because of the differences between CA systems. The CA systems are different in both their application programming interfaces (API) as well as the types of functionality that they support. </p><p>This master thesis presents a study of three APIs from different CA systems. The possibilities of defining a new CA API that supports all the functionality that is provided by existing CA APIs while still being as similar as possible to these existing APIs are investigated. The conclusion from the study is that it is not possible to define this new CA API because the studied CA systems are so different and only small parts of the provided functionality are shared between them.</p>

Digital television broadcasters use conditional access (CA) systems to protect some of their services from being viewed by people not subscribing for these services. A manufacturer of digital television receivers develops applications to handle the CA systems that the receiver shall support. A problem for the application developer is that a CA application developed for one specific CA system is usually not reusable for other CA systems because of the differences between CA systems. The CA systems are different in both their application programming interfaces (API) as well as the types of functionality that they support. This master thesis presents a study of three APIs from different CA systems. The possibilities of defining a new CA API that supports all the functionality that is provided by existing CA APIs while still being as similar as possible to these existing APIs are investigated. The conclusion from the study is that it is not possible to define this new CA API because the studied CA systems are so different and only small parts of the provided functionality are shared between them.

The lack of interoperability between Pay‐TV service providers and a horizontally integrated business transaction model have compromised the competition in the Pay‐TV market. In addition, the lack of interactivity with customers has resulted in high churn rate and improper security measures have contributed into considerable business loss. These issues are the main cause of high operational costs and subscription fees in the Pay‐TV systems. This paper presents a novel end‐to‐end system architecture for Pay‐TV systems cooperating mobile and broadcasting technologies. It provides a cost‐effective, scalable, dynamic and secure access control mechanism supporting converged services and new business opportunities in Pay‐TV systems. It enhances interactivity, security and potentially reduces customer attrition and operational cost. In this platform, service providers can effectively interact with their customers, personalise their services and adopt appropriate security measures. It breaks up the rigid relationship between a viewer and set‐top box as imposed by traditional conditional access systems, thus, a viewer can fully enjoy his entitlements via an arbitrary set‐top box. Having thoroughly considered state‐of‐the‐art technologies currently being used across the world, the thesis highlights novel use cases and presents the full design and implementation aspects of the system. The design section is enriched by providing possible security structures supported thereby. A business collaboration structure is proposed, followed by a reference model for implementing the system. Finally, the security architectures are analysed to propose the best architecture on the basis of security, complexity and set‐top box production cost criteria.

Submitted by ANA HELOÍZA VITA PESSOTTO null (anahvp@gmail.com) on 2016-09-28T15:14:49Z No. of bitstreams: 1 Dissertação Ana Heloiza Vita Pessotto.pdf: 2262963 bytes, checksum: 5e4248ba8fa170d8db544c827ca53813 (MD5) / Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-09-30T16:47:52Z (GMT) No. of bitstreams: 1 pessotto_ahv_me_bauru.pdf: 2262963 bytes, checksum: 5e4248ba8fa170d8db544c827ca53813 (MD5) / Made available in DSpace on 2016-09-30T16:47:52Z (GMT). No. of bitstreams: 1 pessotto_ahv_me_bauru.pdf: 2262963 bytes, checksum: 5e4248ba8fa170d8db544c827ca53813 (MD5) Previous issue date: 2016-08-19 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Esta pesquisa tem como objetivo a avaliação de eficiência da Lei do Serviço de Acesso Condicionado (Lei da TV paga - Lei 12.485/11) a partir dos indicadores: promoção da diversidade cultural, estímulo à produção independente e à produção regional. Para tal fim, a pesquisa apresenta um breve histórico da implantação do serviço de TV paga no Brasil com ênfase para a evolução das regulações direcionadas ao conteúdo. Descreve, com base no modelo do Ciclo de Políticas Públicas, o estágio de implementação da Lei 12.485/11 e o texto final da mesma. Para subsidiar a avaliação, o conceito de cultura nacional é discutido, desvelando as concepções de culturas híbridas (CANCLINI, 2008) e identidades emergentes (BHABHA, 1998) e o papel destes dentro do ambiente cultural globalizado. A presente investigação permite compreender a maneira como se deu a introdução das diretrizes voltadas ao conteúdo na regulação do setor e a forma como estas influenciaram o mercado de produção audiovisual para a TV paga no Brasil. / This research aims to evaluate the efficiency of the Conditional Access Service Law (Pay TV Law - Law 12.485/11) from indicators promoting cultural diversity, fostering of independent productions and regional production. For this purpose, the research presents a brief history of pay TV service deployment in Brazil with emphasis on the development of regulations directed to the content. It describes, based on the model of the Public Policy Cycle, the implementation stage of Law 12,485/11 and the final text of the same. To support the evaluation, the concept of national culture is discussed, revealing the concepts of hybrid cultures (CANCLINI, 2008) and emerging identities (BHABHA, 1998) and their role within the global cultural environment. This research allows us to understand the way how was the introduction of guidelines geared to the content in the sector regulation and how they influenced the audiovisual production market for pay TV in Brazil.