2 research outputs found

    Anonymously accessing JXTA community services through split message forwarding

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    As peer-to-peer (P2P) systems have gained popularity and evolved to encompass different scenarios beyond simple file-sharing, such as ubiquitous and cognitive computing, awareness on the need for inclusion of security mechanisms into its design, has also raised. JXTA is an open P2P protocols specification that, for these reasons, has slowly incorporated security improvements such as message privacy and resource authentication, up to its latest version to this date, 2.7. However, under some contexts, even more advanced security requirements should be met. Anonymity, for which privacy is necessary but not a sufficient requirement, is a good example. Unfortunately, even though several approaches to message anonymization exist within the context of P2P networks, there is no perfect solution. In this work, we study the feasibility of anonymous access to JXTA community services using a split message-based approach. On that regard, we adapt a recently proposed anonymous protocol to JXTA's idiosyncrasies and assess its actual performance under typical JXTA network configurations

    Integrating secure mobile P2P systems and Wireless Sensor Networks

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    Aquesta tesi tracta de les diferents limitacions trobades a WSN per a habilitar-ne el desplegament en nous escenaris i facilitar la difusi贸 de la informaci贸 obtinguda. A un nivell baix, ens centrem en el consum d'energia, mentre que, a un nivell m茅s alt, ens focalitzem en la difusi贸 i la seguretat de la informaci贸. Redu茂m el consum d'una mote individual en xarxes amb patrons de tr脿nsit din脿mic mitjan莽ant la definici贸 d'una funci贸 de planificaci贸 basada en el conegut controlador PID i allarguem la vida d'una WSN globalment distribuint equitativament el consum energ猫tic de totes les motes, disminuint el nombre d'intervencions necess脿ries per a canviar bateries i el cost associat. Per tal d'afavorir la difusi贸 de la informaci贸 provinent d'una WSN, hem proposat jxSensor, una capa d'integraci贸 entre les WSN i el conegut sistema P2P JXTA. Com que tractem informaci贸 sensible, hem proposat una capa d'anonimat a JXTA i un mecanisme d'autenticaci贸 lleuger per a la seva versi贸 m貌bil.Esta tesis trata las diferentes limitaciones encontradas en WSN para habilitar su despliegue en nuevos escenarios, as铆 como facilitar la diseminaci贸n de la informaci贸n obtenida. A bajo nivel, nos centramos en el consumo de energ铆a, mientras que, a un nivel m谩s alto, nos focalizamos en la diseminaci贸n y seguridad de la informaci贸n. Reducimos el consumo de una mota individual en redes con patrones de tr谩fico din谩mico mediante la definici贸n de una funci贸n de planificaci贸n basada en el conocido controlador PID y alargamos la vida de una WSN globalmente distribuyendo equitativamente el consumo energ茅tico de todas las motas, disminuyendo el n煤mero de intervenciones requeridas para cambiar bater铆as y su coste asociado. Para favorecer la diseminaci贸n de la informaci贸n procedente de una WSN hemos propuesto jxSensor, una capa de integraci贸n entre las WSN y el conocido sistema P2P JXTA. Como estamos tratando con informaci贸n sensible, hemos propuesto una capa de anonimato en JXTA y un mecanismo de autenticaci贸n ligero para su versi贸n m贸vil.This thesis addresses different limitations found in WSNs in order to enable their deployment in new scenarios as well as to make it easier to disseminate the gathered information. At a lower level, we concentrate on energy consumption while, at a higher level, we focus on the dissemination and security of information. The consumption of an individual mote in networks with dynamic traffic patterns is reduced by defining a scheduling function based on the well-known PID controller. Additionally, the life of a WSN is extended by equally distributing the consumption of all the motes, which reduces the number of interventions required to replace batteries as well as the associated cost. To help the dissemination of information coming from a WSN we have proposed jxSensor, which is an integration layer between WSNs and the well-known JXTA P2P system. As we are dealing with sensitive information, we have proposed an anonymity layer in JXTA and a light authentication method in its mobile version
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