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Protecting query privacy in location-based services / Xihui Chen in Geoinformatica, vol 18 n° 1 (January 2014)
[article]
Titre : Protecting query privacy in location-based services Type de document : Article/Communication Auteurs : Xihui Chen, Auteur ; Jun Pang, Auteur Année de publication : 2014 Article en page(s) : pp 95 - 133 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Société de l'information
[Termes IGN] métrique
[Termes IGN] protection de la vie privée
[Termes IGN] requête spatiale
[Termes IGN] service fondé sur la positionRésumé : (Auteur) The popularity of location-based services (LBSs) leads to severe concerns on users’ privacy. With the fast growth of Internet applications such as online social networks, more user information becomes available to the attackers, which allows them to construct new contextual information. This gives rise to new challenges for user privacy protection and often requires improvements on the existing privacy-preserving methods. In this paper, we classify contextual information related to LBS query privacy and focus on two types of contexts—user profiles and query dependency: user profiles have not been deeply studied in LBS query privacy protection, while we are the first to show the impact of query dependency on users’ query privacy. More specifically, we present a general framework to enable the attackers to compute a distribution on users with respect to issuing an observed request. The framework can model attackers with different contextual information. We take user profiles and query dependency as examples to illustrate the implementation of the framework and their impact on users’ query privacy. Our framework subsequently allows us to show the insufficiency of existing query privacy metrics, e.g., k-anonymity, and propose several new metrics. In the end, we develop new generalisation algorithms to compute regions satisfying users’ privacy requirements expressed in these metrics. By experiments, our metrics and algorithms are shown to be effective and efficient for practical usage. Numéro de notice : A2014-029 Affiliation des auteurs : non IGN Thématique : SOCIETE NUMERIQUE Nature : Article DOI : 10.1007/s10707-013-0192-0 Date de publication en ligne : 18/10/2013 En ligne : https://doi.org/10.1007/s10707-013-0192-0 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32934
in Geoinformatica > vol 18 n° 1 (January 2014) . - pp 95 - 133[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2014011 RAB Revue Centre de documentation En réserve L003 Disponible Public/private BIM: An Irish perspective / John Deeney in International journal of 3-D information modeling, vol 3 n° 1 (January - March 2014)
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Titre : Public/private BIM: An Irish perspective Type de document : Article/Communication Auteurs : John Deeney, Auteur ; Alan Hore, Auteur ; Barry McAuley, Auteur Année de publication : 2014 Article en page(s) : pp 16 - 28 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications photogrammétriques
[Termes IGN] analyse comparative
[Termes IGN] domaine public
[Termes IGN] formation
[Termes IGN] Irlande
[Termes IGN] modélisation 3D du bâti BIM
[Termes IGN] politique
[Termes IGN] projet
[Termes IGN] secteur privé
[Termes IGN] travaux publicsRésumé : (auteur) The current economic difficulties have affected most practitioners within the industry and, as a result, many firms and contractors are bidding for fewer projects, resulting in below-cost tenders. It is clear that, many firms and contractors are now operating on thin margins; which makes it increasingly difficult for them to commit to the introduction of new software applications and system upgrades. The transition to Building Information Modelling (BIM) from traditional 2D CAD by Irish firms and contractors has been a relatively slow process compared with the international colleagues. There are many reasons for this, including lack of resources, lack of awareness, ignorance, misunderstanding and adversity. The lack of BIM promotion and BIM training opportunities within the industry has meant that very few people possess the basic requirement to successfully embrace BIM at a level which would be considered efficient. BIM is the new way of operating and it is gaining momentum; the industry simply cannot turn a blind eye to the technology or it will be left behind. The industry must therefore adapt and change current working practices in order to compete with other established and recognized BIM nations. This paper will evaluate BIM in the international context and, investigate if these methodologies can be transferred to the Irish construction industry. This paper will also aim to identify obstacles and drivers for Irish firms, contractors and Government Departments with regard to BIM adoption, as well as the behavioral and cultural elements which are preventing BIM adoption in Ireland. It is hoped that the research findings will demonstrate a business case for the implementation of BIM, for both public and private sector organizations. Numéro de notice : A2014-751 Affiliation des auteurs : non IGN Thématique : IMAGERIE/POSITIONNEMENT Nature : Article DOI : 10.4018/ij3dim.2014010102 En ligne : http://doi.org/10.4018/ij3dim.2014010102 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=76173
in International journal of 3-D information modeling > vol 3 n° 1 (January - March 2014) . - pp 16 - 28[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 138-2014011 RAB Revue Centre de documentation En réserve L003 Disponible Human computation VGI provenance : Semantic web-based representation and publishing / Irene Celino in IEEE Transactions on geoscience and remote sensing, vol 51 n° 11 (November 2013)
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Titre : Human computation VGI provenance : Semantic web-based representation and publishing Type de document : Article/Communication Auteurs : Irene Celino, Auteur Année de publication : 2013 Article en page(s) : pp 5137 - 5144 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Infrastructure de données
[Termes IGN] données localisées des bénévoles
[Termes IGN] qualité des données
[Termes IGN] représentation des données
[Termes IGN] service web sémantique
[Termes IGN] source de données
[Termes IGN] web 2.0
[Termes IGN] web sémantiqueRésumé : (Auteur) The collection of volunteered geographic information (VGI) is a user-generated content practice to engage a large number of citizens to collectively create geospatial data. Based on the advent of Web 2.0 and the recent increasing popularity of crowdsourcing approaches, VGI has gained the interest of the geoscience community, because of its ability to complement the collection of geographic information coming from traditional sensing technologies. However, the involvement of a crowd of volunteers, potentially untrained or nonexperts, implies that VGI can be of varying quality. Tracing VGI provenance enables the recording of the collection activity; the information about who gathered what, where and when can then be employed to judge the VGI quality. In this paper, we focus on the adoption of a provenance-based Human Computation approach to aggregate and consolidate VGI. We discuss the representation, inference and publication of Human Computation VGI and its provenance. As more and more of those community-based data collection efforts happen on the Web, we propose the adoption of Semantic Web technologies, through employing an ontological formulation to capture provenance and by following Linked Data principles to publish provenance data on the Web. Numéro de notice : A2013-614 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/SOCIETE NUMERIQUE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2013.2252015 En ligne : https://doi.org/10.1109/TGRS.2013.2252015 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32750
in IEEE Transactions on geoscience and remote sensing > vol 51 n° 11 (November 2013) . - pp 5137 - 5144[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 065-2013111 RAB Revue Centre de documentation En réserve L003 Disponible Putting the (ultra-low) power in geofence: host-offload GNSS positioning / Miguel Torroja in GPS world, vol 24 n° 11 (November 2013)
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Titre : Putting the (ultra-low) power in geofence: host-offload GNSS positioning Type de document : Article/Communication Auteurs : Miguel Torroja, Auteur ; Steve Malkos, Auteur ; Christophe Verne, Auteur Année de publication : 2013 Article en page(s) : pp 29 - 35 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Navigation et positionnement
[Termes IGN] Androïd
[Termes IGN] géorepérage
[Termes IGN] service fondé sur la position
[Termes IGN] téléphone intelligent
[Termes IGN] traçageRésumé : (Editeur) Users of smartphones, tablets and other devices expect position with the highest level of accuracy, always available, with the least amount of power consumed. One recent improvement fulfilling this demand involves operating-system services for location on smartphones, and the evolution towards lower power solutions. Numéro de notice : A2013-582 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32718
in GPS world > vol 24 n° 11 (November 2013) . - pp 29 - 35[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 067-2013111 RAB Revue Centre de documentation En réserve L003 Disponible Blind evaluation of location based queries using space transformation to preserve location privacy / Ali Khshgozaran in Geoinformatica, vol 17 n° 4 (October 2013)
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Titre : Blind evaluation of location based queries using space transformation to preserve location privacy Type de document : Article/Communication Auteurs : Ali Khshgozaran, Auteur ; Houtan Shirani-Mehr, Auteur ; Cyrus Shahabi, Auteur Année de publication : 2013 Article en page(s) : pp 599 - 634 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Analyse spatiale
[Termes IGN] espace de Hilbert
[Termes IGN] géopositionnement
[Termes IGN] plus proche voisin, algorithme du
[Termes IGN] protection de la vie privée
[Termes IGN] requête spatiale
[Termes IGN] service fondé sur la position
[Termes IGN] utilisateurRésumé : (Auteur) In this paper, we propose a fundamental approach to perform the class of Range and Nearest Neighbor (NN) queries, the core class of spatial queries used in location-based services, without revealing any location information about the query in order to preserve users’ private location information. The idea behind our approach is to utilize the power of one-way transformations to map the space of all objects and queries to another space and resolve spatial queries blindly in the transformed space. Traditional encryption based techniques, solutions based on the theory of private information retrieval, or the recently proposed anonymity and cloaking based approaches cannot provide stringent privacy guarantees without incurring costly computation and/or communication overhead. In contrast, we propose efficient algorithms to evaluate KNN and range queries privately in the Hilbert transformed space. We also propose a dual curve query resolution technique which further reduces the costs of performing range and KNN queries using a single Hilbert curve. We experimentally evaluate the performance of our proposed range and KNN query processing techniques and verify the strong level of privacy achieved with acceptable computation and communication overhead. Numéro de notice : A2013-511 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE Nature : Article DOI : 10.1007/s10707-012-0172-9 Date de publication en ligne : 29/11/2012 En ligne : https://doi.org/10.1007/s10707-012-0172-9 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=32649
in Geoinformatica > vol 17 n° 4 (October 2013) . - pp 599 - 634[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 057-2013041 RAB Revue Centre de documentation En réserve L003 Disponible Using virtual reality and percolation theory to visualize fluid flow in porous media / Carlos Magno De Lima in Geoinformatica, vol 17 n° 4 (October 2013)PermalinkInformations dématérialisées, la grande peur / Isabelle De Saint-Cricq in Géomètre, n° 2106 (septembre 2013)PermalinkMapping social activities and concepts with social media (Twitter) and web search engines (Yahoo and Bing): a case study in 2012 US Presidential Election / Ming-Hsiang Tsou in Cartography and Geographic Information Science, vol 40 n° 4 (September 2013)PermalinkOne protocol to rule them all / Manikantan Parameswaran in GEO: Geoconnexion international, vol 12 n° 8 (september 2013)PermalinkUsing video acquired from an unmanned aerial vehicle (UAV) to measure fracture orientation in an open-pit mine / Tara McLeod in Geomatica, vol 67 n° 3 (September 2013)PermalinkThe influence of digital surface model choice on visibility-based mobile geospatial applications / Sam Meek in Transactions in GIS, vol 17 n° 4 (August 2013)PermalinkSemi-automated analysis of high-resolution aerial images to quantify docks in glacial lakes / Marcus W. Beck in ISPRS Journal of photogrammetry and remote sensing, vol 81 (July 2013)PermalinkGéom@TICE, séminaire national sur l'usage des TICE dans l'enseignement de la géomatique / Mathieu Koehl in XYZ, n° 135 (juin - août 2013)PermalinkLocation-based illustration mapping applications and editing tools / Min Lu in Cartographica, vol 48 n° 2 (June 2013)PermalinkSIG seniors / Michel Deriaz in Géomatique expert, n° 92 (01/06/2013)Permalink