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On Preserving Secrecy in Mobile Social Networks

Suntaxi, Gabriela; El Ghazi, Aboubakr Achraf; Böhm, Klemens

Abstract:
Location-based services are one of the most important services offered by mobile social networks. Offering this kind of services requires accessing the physical position of users together with the access authorizations, i.e., who is authorized to access what information. However, these physical positions and authorizations are sensitive information which have to be kept secret from any adversary, including the service providers. As far as we know, the problem of offering location-based services in mobile social networks with a revocation feature under collusion assumption, i.e., an adversary colludes with the service provider, has not been studied. In this paper, we show how to solve this problem in the example of range queries. Specifically, we guarantee any adversary, including the service provider, is not able to learn (1) the physical position of the users, (2) the distance between his position and that of the users, and (3) whether two users are allowed to learn the distance between them. We propose two approaches namely two-layer symmetric encryption and two-layer attribute-based encryption. The main difference between the first and the second approach is that they use, among other encryption schemes, symmetric and attribute-based encryption, respectively. ... mehr

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Volltext §
DOI: 10.5445/IR/1000096955
Veröffentlicht am 30.07.2019
Coverbild
Zugehörige Institution(en) am KIT Institut für Programmstrukturen und Datenorganisation (IPD)
Publikationstyp Forschungsbericht
Jahr 2019
Sprache Englisch
Identifikator ISSN: 2190-4782
KITopen-ID: 1000096955
Verlag KIT, Karlsruhe
Umfang 27 S.
Serie Karlsruhe Reports in Informatics ; 2019,7
Schlagworte mobile social networks; access control; location-based services
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