92 search results - page 17 / 19 » On Answering Queries in the Presence of Limited Access Patte... |
SIGCOMM
2010
ACM
13 years 8 months ago
2010
ACM
We propose a new approach to ensure privacy in location based services, without requiring any support from a"trusted" entity. We observe that users of location based ser...
CCS
2007
ACM
14 years 1 months ago
2007
ACM
In this paper, we study the maintenance of role-based access control (RBAC) models in database environments using transitive closure relations. In particular, the algorithms that ...
ICDE
2009
IEEE
14 years 9 months ago
2009
IEEE
In recent years, the data management community has begun to consider situations in which data access is closely tied to network routing and distributed acquisition: examples includ...
CIKM
2009
Springer
14 years 11 days ago
2009
Springer
Exact substring matching queries on large data collections can be answered using q-gram indices, that store for each occurring q-byte pattern an (ordered) posting list with the po...
ICDT
2012
ACM
11 years 10 months ago
2012
ACM
In a recent paper by Hellerstein [15], a tight relationship was conjectured between the number of strata of a Datalog¬ program and the number of “coordination stages” require...