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Ara es mostren els items 11-30 de 55

    • Certificate revocation system implementation based on the Merkle Hash Tree 

      Muñoz Tapia, José Luis; Forné Muñoz, Jorge; Esparza Martín, Óscar; Soriano Ibáñez, Miguel (2004-01)
      Article
      Accés restringit per política de l'editorial
      Public-key cryptography is widely used to provide Internet security services. The public-key infrastructure (PKI) is the infrastructure that supports the public-key cryptography, and the revocation of certificates implies ...

    • CERVANTES - A certificate validation test-bed 

      Muñoz Tapia, José Luis; Forné Muñoz, Jorge; Esparza Martín, Óscar; Soriano Ibáñez, Miguel (Springer Berlin / Heidelberg, 2004)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Certificate validation is one of the toughest scalability problems of the PKI. The goal of this paper is to introduce a Java platform for certificate revocation called CERVANTES. CERVANTES pretends to be an easy to extend ...

    • COACH: COllaborative certificate stAtus CHecking mechanism for VANETs 

      Hernández Gañán, Carlos; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Mata Diaz, Jorge; Hernández Serrano, Juan; Alins Delgado, Juan José (2011-11-01)
      Article
      Accés restringit per política de l'editorial
      Vehicular Ad Hoc Networks (VANETs) require mechanisms to authenticate messages, identify valid vehicles, and remove misbehaving vehicles. A public key infrastructure (PKI) can be used to provide these functionalities using ...

    • Comprehensive IoT-driven fleet management system for industrial vehicles 

      FARAHPOOR, MOHAMMADALI; Esparza Martín, Óscar; Soriano Ibáñez, Miguel (Institute of Electrical and Electronics Engineers (IEEE), 2023)
      Article
      Accés obert
      In the context of fleet management, various challenges, including equipment breakdowns, rising maintenance costs, inefficient resource utilization, and outdated telematics systems, necessitate a transformative approach. ...

    • Contribución a la protección de agentes móviles frente a hosts maliciosos. Detección de ataques y políticas de castigo 

      Esparza Martín, Óscar (Universitat Politècnica de Catalunya, 2004-07-07)
      Tesi
      Accés obert
      Este trabajo presenta tanto el estado del arte como el análisis de las principales propuestas de protección de agentes móviles frente a los ataques de la plataforma de ejecución. La comprensión del problema de los hosts ...

    • Cross-layer packet scheduler for QoS support over digital video broadcasting-second generation broadband satellite systems 

      Rendón Morales, Elizabeth; Mata Diaz, Jorge; Alins Delgado, Juan José; Muñoz Tapia, José Luis; Esparza Martín, Óscar (2014-10-01)
      Article
      Accés restringit per política de l'editorial
      This article presents a cross-layer packet scheduler to provide end-to-end QoS guarantees for Digital Video Broadcasting-Second Generation (DVB-S2) broadband satellite systems. The scheduler design is based on a cross-layer ...

    • DECADE: Distributed Emergent Cooperation through ADaptive Evolution in mobile ad hoc networks 

      Mejía Fajardo, Marcela; Peña Traslaviña, Néstor; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Alzate Monroy, Marco (Elsevier, 2012-09)
      Article
      Accés restringit per política de l'editorial
      The scarce resources of a mobile ad hoc network (MANET) should not be wasted attending selfish nodes (those nodes that use resources from other nodes to send their own packets, without offering their own resources to forward ...

    • DEFS - Data exchange with Free Sample Protocol 

      Genés Durán, Rafael; Hernández Serrano, Juan; Esparza Martín, Óscar; Bellés Muñoz, Marta; Muñoz Tapia, José Luis (2021-06-17)
      Article
      Accés obert
      Distrust between data providers and data consumers is one of the main obstacles hampering digital-data commerce to take off. Data providers want to get paid for what they offer, while data consumers want to know exactly ...

    • Design and implementation of a lightweight online certificate validation service 

      Muñoz Tapia, José Luis; Esparza Martín, Óscar; Forné Muñoz, Jorge; Pallarès Segarra, Esteve (2009-07)
      Article
      Accés restringit per política de l'editorial
      A PKI (public key infrastructure) provides for a digital certificate that can identify an individual or an organization. However, the existence of a certificate is a necessary but not sufficient evidence for its validity. ...

    • EPA: An efficient and privacy-aware revocation mechanism for vehicular ad hoc networks 

      Hernández Gañan, Carlos; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Mata Diaz, Jorge; Alins Delgado, Juan José (Elsevier, 2015-08-01)
      Article
      Accés obert
      Security is vital for the reliable operation of vehicular ad hoc networks (VANETs). One of the critical security issues is the revocation of misbehaving vehicles. While essential, revocation checking can leak private ...

    • Evaluation of cryptographic capabilities for the Android platform 

      Gonzalez Peon, David; Esparza Martín, Óscar; Muñoz Tapia, José Luis; Alins Delgado, Juan José; Mata Diaz, Jorge (Springer, 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Future networks will be formed by millions of devices, many of them mobile, sharing information and running applications. Android is currently the most widely used operating system in smartphones, and it is becoming more ...

    • Evaluation of TCP congestion control algorithms with traffic control policies in a PEP-based geosynchronous satellite scenario 

      Ramos López, Daniel; Esparza Martín, Óscar; Mata Diaz, Jorge; Alins Delgado, Juan José (Elsevier, 2024-02-01)
      Article
      Accés obert
      Much work has been done in recent years comparing TCP variants in many scenarios, including the satellite one. Some of these studies were carried out with the ns-2 and ns-3 simulators, which may give a good idea of the ...

    • Exercicis tema 1. Xarxes de telecomunicació i els seus models matemàtics 

      Calveras Augé, Anna M.; Casademont Serra, Jordi; Esparza Martín, Óscar; Hesselbach Serra, Xavier; Muñoz Tapia, José Luis; Paradells Aspas, Josep; Pegueroles Vallés, Josep R.; Rojas Espinosa, Alfonso (Universitat Politècnica de Catalunya, 2010-03)
      Problema, exercici
      Accés obert

    • Impact of the revocation service in PKI prices 

      Hernández Gañán, Carlos; Muñoz Tapia, José Luis; Esparza Martín, Óscar; Mata Diaz, Jorge; Alins Delgado, Juan José (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The ability to communicate securely is needed for many network applications. Public key infrastructure (PKI) is the most extended solution to verify and confirm the identity of each party involved in any secure transaction ...

    • Implementacion de Ipsec en una arquitectura TCP splitting 

      Caubet Fernández, Juan; Muñoz Tapia, José Luis; Alins Delgado, Juan José; Mata Diaz, Jorge; Esparza Martín, Óscar (2010)
      Text en actes de congrés
      Accés obert
      El rendimiento de las aplicaciones que utilizan el protocolo de transporte TCP (Transmission Control Protocol) sobre enlaces vía satélite tiene una degradación significativa. Esto se debe principalmente a que el algoritmo ...

    • Mecanismo para evitar ataques por confabulación basados en code passing 

      Jáimez Moruno, Marc; Esparza Martín, Óscar; Hernández Gañán, Carlos; Parra Arnau, Javier (2009)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Los agentes móviles son entidades software formadas por código, datos, itinerario y estado, que pueden migrar de host en host autónomamente ejecutando su código. A pesar de sus ventajas, los aspectos de seguridad restringen ...

    • MHT-based mechanism for certificate revocation in VANETs 

      Muñoz Tapia, José Luis; Esparza Martín, Óscar; Hernández Gañán, Carlos; Mata Diaz, Jorge; Alins Delgado, Juan José; Ganchev, Ivan (Springer, 2014-07)
      Capítol de llibre
      Accés restringit per política de l'editorial
      Vehicular Ad Hoc Networks (VANETs) require mechanisms to authenticate messages, identify valid vehicles, and remove misbehaving vehicles. A Public Key Infrastructure (PKI) can be utilized to provide these functionalities ...

    • Multipath TCP architecture for infotainment multimedia applications in vehicular networks 

      Reñé, Sergi; EXPOSITO, ERNESTO; Gineste, Mathieu Gineste; Alins Delgado, Juan José; Esparza Martín, Óscar (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The large deployment of Internet resources has facilitated the accelerated development of Intelligent Transport Systems (ITS) including a large diversity of distributed applications such as non-safety infotainment vehicular ...

    • NeuroCast: adaptive multi-source P2P video streaming application for wireless networks 

      Gañan, Carlos; Caubet Fernández, Juan; Mata Diaz, Jorge; Alins Delgado, Juan José; Esparza Martín, Óscar (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Streaming consists in distributing media to large audiences over a computer network. Providing a streaming service for wireless mobile nodes presents many challenges. A peer-to-peer (P2P) solution has the big advantage of ...

    • Nuevo sistema de emisión de CRLs para la red KAD 

      Caubet, Juan; Hernández Gañán, Carlos; Esparza Martín, Óscar; Muñoz Tapia, José Luis (Editorial Universidad de Granada, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Muchas overlays P2P requieren ciertos servicios de seguridad para poder ser utilizadas como aplicaciones comerciales, y una simple Infraestructura de Clave P´ublica (PKI) podr´ia solucionar el problema. Sin embargo, ...