Map-Aware Position Sharing for Location Privacy in Non-trusted Systems

摘要: Many current location-based applications (LBA) such as friend finder services use information about the positions of mobile users. So-called location (LSs) have been proposed to manage these user efficiently. However, managing raises privacy issues, in particular, if providers LSs are only partially trusted. Therefore, we presented concept private position sharing for trusted systems a previous paper [1]. The basic idea is split precise into set shares well-defined limited precision and distribute among different providers. The main contributions this two extended approaches that improve our approach ways: Firstly, reduce predictability share generation allows an attacker gain further from sub-set increase precision. Secondly, present algorithm constrained movement scenarios whereas existing was tailored open space environments. vulnerable map-based attacks. takes map knowledge account.