Sciweavers

1927 search results - page 67 / 386
» An Access Control Model for Location based Services
Sort
View
DBSEC
2007
87views Database» more  DBSEC 2007»
14 years 11 months ago
Towards a Times-Based Usage Control Model
Abstract. Modern information systems require temporal and privilegeconsuming usage of digital objects. To meet these requirements, we present a new access control model–Times-bas...
Baoxian Zhao, Ravi S. Sandhu, Xinwen Zhang, Xiaoli...
COLCOM
2008
IEEE
15 years 4 months ago
Access Control Model for Sharing Composite Electronic Health Records
The adoption of electronically formatted medical records, so called Electronic Health Records (EHRs), has become extremely important in healthcare systems to enable the exchange of...
Jing Jin, Gail-Joon Ahn, Michael J. Covington, Xin...
NETWORKING
2007
14 years 11 months ago
Performance and Equilibrium Analysis of Heterogeneous IEEE 802.11 Based WLANs
This paper presents a general model to study the medium access control (MAC) layer performance and equilibrium of WLANs consisting of nodes with different MAC parameters (e.g., ba...
Hao Zhu
VLDB
2006
ACM
171views Database» more  VLDB 2006»
15 years 10 months ago
Grid-partition index: a hybrid method for nearest-neighbor queries in wireless location-based services
Abstract Traditional nearest-neighbor (NN) search is based on two basic indexing approaches: object-based indexing and solution-based indexing. The former is constructed based on t...
Baihua Zheng, Jianliang Xu, Wang-Chien Lee, Dik Lu...
SPW
2001
Springer
15 years 2 months ago
On the Negotiation of Access Control Policies
Although the notion of negotiation has been used extensively in secure communication protocols to establish common keying states, protocol modes and services, this notion is only n...
Virgil D. Gligor, Himanshu Khurana, Radostina K. K...