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In order to ensure end user devices are healthy enough to gain access to the network, providers are making use of advanced network access control solutions, which propose an evaluation of configuration information (posture) about the device itself before providing access to the network. However, current solutions are focused on intra-domain scenarios, where end users and network belong to the same...
It is a common belief among researchers of the intelligent transportation systems (ITS) community that ITS applications are the key to make transportation systems safer, more comfortable, and more efficient, while reducing the environmental impact. However, there seems to be a gap between ITS community and final users. It cannot be assumed that the advantages of ITS are clear to the users, and we...
Evaluation of vehicular ad-hoc networks (VANETs) over real environments is still a remaining issue for most researchers. There are some works dealing with common 802.11 analysis over real vehicular environments, which carry out performance tests to measure the quality of the communication channel and justify results according to physical and MAC conditions. There are only a few works regarding multi-hop...
We present an integrated vehicular system for the collection, management, and provision of context-aware information on traffic and driver location. This system uses an integrated vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication paradigm enriched with an information management system. The infrastructure manages vehicle-detected safety hazards and other relevant information,...
A proposed identity management framework provides privacy protection, by means of virtual identities, and cross-layer single sign-on for users who subscribe to multiple service and identity providers.
In this paper, the authors describe the development of a framework for collaborative spontaneous networks. A spontaneous network is created when a group of users comes together and uses wireless computing devices in order to carry- out a collaborative activity. The target of this framework is to provide efficient communications for groups of users in such a scarce resource environment. The architecture...
During the last years, peer to peer (P2P) networks are becoming more and more popular because of their inherent properties that allow users to exchange information and also to collaborate between them with a tremendous easiness.In parallel to this evolution, the use of MANETs has been increased due to the low effort needed to their deployment.Nowadays every user equipped with a mobile device like...
This paper describes the experience of the University of Murcia in the design and development of security SOA infrastructures for electronic government, which provide university community with secure and interoperable services.
Location-based services (LBS) are currently receiving world-wide attention as a consequence of the massive usage of mobile devices, but such location services require scalable distributed infrastructures in order to resolve spatial queries efficiently. We propose a novel methodology to enable geographical query support to distributed hash tables (DHTs). The contributions of our methodology are the...
This document describes how the DESEREC framework can be enhanced through the usage of an offline learning loop. This mechanism consists basically of computational methods and techniques which enable the framework to gradually improve the effectiveness of its behaviour, by analysing internal data produced by some of the modules, applying some learning algorithms to them and to the information received...
Intrusion detection systems (IDS) are usually one of the basic mechanisms in use when defining security measures in one organization. However, there are a few active research lines still to be addressed regarding these complex systems. This is the case of event aggregation and correlation when dealing with complex attacks, or the improvement in flexibility when dealing with different versions (mutations)...
In this paper we present a context-aware data sharing service over MANet to enable spontaneous collaboration between mobile workers. Context information is used to adapt services and applications to user situation as well as working groups situation. The paper first presents the data sharing system. It then describes the context awareness service. We explain how data sharing uses context information...
Proposals such as CAdES, XAdES and LTANS have made the need of remaining evidences over long periods of time clear. Between these evidences we have electronic signatures, certificates, requests and responses of validation mechanisms and so on. In order to gather these evidences, clients have to support several PKI-compliant protocols. Then, with the aim of simplifying this task XKMS appeared. However,...
In the field of vehicular networks, the amount of telematic services which are usually taken into account is very limited. Safety services, and specifically collision avoidance applications, practically receive an exclusive attention. Due to vehicular ad-hoc networks (VANETs) are the most used communication technology, services conceived for the vehicle domain are frequently designed to take advantage...
Information sharing and provision in the vehicular field is nowadays a growing research topic in Intelligent Transportation Systems (ITS). Although a lot of work is being carried out in these terms, the most of the approximations are based on local solutions which solve a particular problem. Communication protocols are proposed to exchange information among vehicles in vehicular ad-hoc networks (VANETs),...
Broadband connections to Internet make possible offering new services such as multimedia on demand (MoD). To the date, content providers and distributors resort to use specifically developed software to deal with payments. The problem is that those customized solutions are limited to either a specific payment protocol, brand and payment service provider, or a determinate architecture or a concrete...
Nowadays e-purses are not being offered as payment method on the Internet. This is mainly due to the fact that vendors have to integrate in their devices a security application module (SAM) to exchange security messages between the e-purse and that module during the payment phase. In this paper we introduce a new payment method that combines the main advantages of e-purses and the use of e-coins to...
The use of synchronous groupware offers to collaborators similar advantages than face to face meeting. Regarding the design of systems of this kind, the most accurate middleware is the use of messages oriented middleware (MOM). One of the current issues which affects also to collaborative environments is interoperability. More concretely, the use of web service standards has gained its prominence...
Low value electronic content is not being offered following a model in which the content is accessed clicking in a new sort of links called per-fee-links. The goal of these links is making the (micro)payment of a web content as simple as possible: just by clicking on a link. Despite this model has been proposed as an approach to pay low-value content on the web, we do not find any existing framework...
This paper proposes an interactive multiple model (IMM) based method for predicting lane changes in highways, as a part of a scene interpreter system. The sensor unit consists of a set of low cost GPS/IMU (Global Positioning System/Inertial Measurement Unit) sensors and an odometry captor for collecting velocity measurements. Extended Kalman filters running in parallel and integrated by an IMM based...
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