354 search results - page 14 / 71 » Key management for content access control in a hierarchy |
CCS
2008
ACM
14 years 11 months ago
2008
ACM
Pervasive computing environments have created a requirement for spatial- and temporal-aware access control systems. Although temporal, spatial and spatio-temporal role-based acces...
WCNC
2010
IEEE
14 years 8 months ago
2010
IEEE
—In this paper, we present an interference model for cognitive radio (CR) networks employing power control or contention control scheme. The probability density functions (PDFs) ...
119
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TCOM
2010
14 years 8 months ago
2010
Dynamic spectrum access (DSA) is an integral part of cognitive radio technology aiming at efficient management of the available power and bandwidth resources. The present paper d...
PODS
1989
ACM
15 years 1 months ago
1989
ACM
In this paper we propose the use of fractals and especially the Hilbert curve, in order to design good distance-preserving mappings. Such mappings improve the performance of secon...
112
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CSREAPSC
2006
14 years 11 months ago
2006
Abstract. The explosive evolution of pervasive computing environments presents several new challenges such as smart spaces, invisibility, localized scalability, and masking uneven ...