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GIS
2009
ACM
13 years 7 months ago
LBS (k, T)-anonymity: a spatio-temporal approach to anonymity for location-based service users
We propose a location-based query anonymization technique, LBS (k,T)-anonymization, that ensures anonymity of user's query in a specific time window against what we call know...
Amirreza Masoumzadeh, James Joshi, Hassan A. Karim...
SACMAT
2009
ACM
14 years 4 months ago
Dynamic mandatory access control for multiple stakeholders
In this paper, we present a mandatory access control system that uses input from multiple stakeholders to compose policies based on runtime information. In the emerging ubiquitous...
Vikhyath Rao, Trent Jaeger
PKC
2009
Springer
210views Cryptology» more  PKC 2009»
14 years 10 months ago
Controlling Access to an Oblivious Database Using Stateful Anonymous Credentials
In this work, we consider the task of allowing a content provider to enforce complex access control policies on oblivious protocols conducted with anonymous users. As our primary ...
Scott E. Coull, Matthew Green, Susan Hohenberger
SOUPS
2009
ACM
14 years 4 months ago
How users use access control
Existing technologies for file sharing differ widely in the granularity of control they give users over who can access their data; achieving finer-grained control generally requ...
Diana K. Smetters, Nathan Good
CCS
2005
ACM
14 years 3 months ago
PeerAccess: a logic for distributed authorization
This paper introduces the PeerAccess framework for reasoning about authorization in open distributed systems, and shows how a parameterization of the framework can be used to reas...
Marianne Winslett, Charles C. Zhang, Piero A. Bona...