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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Mecanismos de seguran?a para um sistema cooperativo de armazenamento de arquivos baseado em P2P

Lima Filho, Francisco Sales de 03 November 2010 (has links)
Made available in DSpace on 2014-12-17T14:55:45Z (GMT). No. of bitstreams: 1 FranciscoSLF_DISSERT.pdf: 3096340 bytes, checksum: fbb14f36dfa3f807cc960ba2d74b9f0a (MD5) Previous issue date: 2010-11-03 / Previous works have studied the characteristics and peculiarities of P2P networks, especially security information aspects. Most works, in some way, deal with the sharing of resources and, in particular, the storage of files. This work complements previous studies and adds new definitions relating to this kind of systems. A system for safe storage of files (SAS-P2P) was specified and built, based on P2P technology, using the JXTA platform. This system uses standard X.509 and PKCS # 12 digital certificates, issued and managed by a public key infrastructure, which was also specified and developed based on P2P technology (PKIX-P2P). The information is stored in a special file with XML format which is especially prepared, facilitating handling and interoperability among applications. The intention of developing the SAS-P2P system was to offer a complementary service for Giga Natal network users, through which the participants in this network can collaboratively build a shared storage area, with important security features such as availability, confidentiality, authenticity and fault tolerance. Besides the specification, development of prototypes and testing of the SAS-P2P system, tests of the PKIX-P2P Manager module were also performed, in order to determine its fault tolerance and the effective calculation of the reputation of the certifying authorities participating in the system / Trabalhos anteriores estudaram caracter?sticas e peculiaridades das redes P2P, especialmente no que se refere aos aspectos de seguran?a da informa??o. A maioria dos trabalhos aborda, de alguma maneira, o compartilhamento de recursos e, em especial, o armazenamento de arquivos. Este trabalho complementa estudos anteriores e acrescenta novas defini??es referentes a este tipo de sistemas. Foi especificado e constru?do um sistema de armazenamento seguro baseado na tecnologia P2P (SAS-P2P), utilizando a plataforma JXTA. Tal sistema utiliza certificados digitais padr?o X.509 e PKCS#12 (RSA 1999), emitidos e gerenciados por uma infraestrutura de chaves p?blicas, que tamb?m foi especificada e constru?da baseada na tecnologia P2P (PKIX-P2P). As informa??es s?o armazenadas no sistema SAS-P2P em arquivos no formato XML que ? especialmente preparado, facilitando a manipula??o e interoperabilidade entre aplica??es. O sistema SAS-P2P foi desenvolvido com o intuito de ser oferecido como um servi?o complementar da rede GigaNatal, atrav?s do qual os participantes dessa rede possam, colaborativamente, construir uma ?rea de armazenamento compartilhada com importantes recursos de seguran?a como disponibilidade, confidencialidade, autenticidade e toler?ncia a falhas. Al?m da especifica??o, constru??o e experimentos do sistema SAS-P2P como um todo, tamb?m foram realizados testes do m?dulo PKIX-P2P no que se refere ? toler?ncia a falhas e c?lculo efetivo da reputa??o das autoridades certificadoras participantes do sistema

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