Ocorre atualmente um movimento de aumento da importância que a manutenção da segurança da informação vem adquirindo em redes de informação de crítica. Ao longo das últimas décadas a utilização de ferramentas criptográficas, especialmente aquelas baseadas em problemas de díficil solução computacional, foram suficientes para garantir a segurança dos sistemas de comunicação. Contudo, o desenvolvimento da nova técnica de processamento de informação conhecida como computação quântica e os resultados téoricos e experimentais apresentados por esta mostram que é possível inviabilizar alguns dos sistemas de criptografia atuais amplamente utilizados. A existência de tal vulnerabilidade representa um fator crítico em redes em que falhas de segurança da informação podem estar associadas a riscos de segurança física. Uma alternativa para os métodos criptográficos atuais consiste na utilização de sistemas quânticos na obtenção de um método criptográfico, o que se conhece como criptografia quântica. Este novo paradigma tem seu fundamento resistente mesmo na presença de capacidade tecnológica ilimitada, incluindo o cenário com disponibilidade de computação quântica. Este trabalho tem como objetivo levantar os impactos que o desenvolvimento da computação quântica têm sobre a segurança dos atuais sistemas criptográficos, apresentar e desenvolver alternativas de protocolos de criptografia quântica disponíveis, e realizar um estudo de caso por meio da avaliação da utilização de criptografia quântica no contexto da Aeronautical Telecommunication Network (ATN). Isto é feito por meio do desenvolvimento de um ambiente de simulacão que permite avaliar o comportamento de um protocolo de criptografia quântica em um cenário em um ambiente com requisitos de missão crítica, como é o caso da ATN. / The importance of security maintenance in critical information networks has been rising in recent times. Over the past decades, the utilization of cryptography tools, mainly those based on computationally intractable problems, was enough to ensure the security of communications systems. The development of the new information processing technique known as quantum computation and the theoretical and experimental results showed by this approach demonstrated that could be possible to cripple the current widely used cryptography techniques. This vulnerability represents a critical issue for networks where a security fault could be associated to a safety fault. An alternative for the current cryptography methods consists in the utilization of quantum systems to obtain a new cryptographic method. The new paradigm presented by this approach has solid principles even in the presence of unlimited computational capacity, including the scenario with availability of quantum computation. The aim of this work is the assessment of impacts that the development of quantum computation has over the current cryptographic methods security, the presentation and development of alternatives based on quantum cryptography protocols, and the development of a case study using the case of Aeronautical Telecommunication Network (ATN). This aim is reached by means of the development of a simulation environment that allows the evaluation of a quantum cryptography protocol behavior in an environment with mission critical requirements, like the ATN case.

by Richard S. Marcus. / "September 1, 1982." / Bbliography: p. 64-68. / National Science Foundation Division of Information Science and Technology Grant Number NSF IST-80-06516

Originally presented as part of dissertation, Texas Woman's University. / Includes bibliographical references and index.

The goals of this thesis are to identify the objectives for creating a Sustainable Community Network (SCN) within B.C., to acknowledge the various tools available to facilitate the network, and to develop illustrative models to guide those contemplating the establishment of a network. Three primary research methods were utilized in this project: literature reviews, group discussion in a focus workshop, and individual interviews. The literature reviewed focused on the fields of collaboration, networks in both technical and social capacities, and coalitions. Four objectives are identified as motives to create a SCN: to provide exchange mechanisms, to organise the "unformalized" field, to create a community of interest, and to be a vehicle for power, influence and empowerment. The emphasis at the beginning should be on building personal relationships over creating an electronic network. Other specific products and services are identified as beneficial for the stakeholders: newsletters, conferences, inventories, facilitation, and a clearinghouse for information. Alternatives for administering the network include a network manager, an administrative body, a governing body, and an intermediary broker. This research helps define networks within the field of planning. They may act as a support system, streamline efforts through collaboration or by reducing duplication of effort, act as a forum for monitoring and assessment activities, and be a source for on-going public participation. Three conceptual models are developed representing a range of possibilities for creating the network. The models are labeled the "Fundamental Network" at the basic level, the "Coalition Network", and the "Collaborative Network" at the most complex level. The need for a SCN is reconfirmed. The network should proceed from a "human scale" and develop the capabilities of the electronic network as computer literacy and technological capacity become generally available. Finally, it is recommended that the network should proceed slowly, building on community objectives and incorporating the diverse activities possible through collaboration as experience is gained. Further research is needed to clarify the potential for networks in planning and management, to better understand the evolving place for computer technology, and to monitor the effectiveness of the networks as they are implemented.

Thesis (MEd (Human Resources Studies))--University of South Australia, 1996

Thesis (MEd (Human Resources Studies))--University of South Australia, 1996

No description available.

No description available.

Thesis (Ph. D.)--University of Toronto, 2006. / Source: Dissertation Abstracts International, Volume: 67-06, Section: A, page: 2064. Includes bibliographical references (leaves 175-184).

Thesis (M.A.) - Carleton University, 2002. / Includes bibliographical references (p. 147-159). Also available in electronic format on the Internet.